Exhibit 10.4

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PROMISSORY NOTE

Principal	Loan Date	Maturity	Loan No	Call / Coll	Account	Officer	Initials
$1,742,500.00	12-10-2021	12-10-2026	5129117	1E1 / 406	IAA0219	PEW
References in the boxes above are for Lender’s use only and do not limit the applicability of this document to any particular loan or item. Any item above containing “***” has been omitted due to text length limitations.

Borrower: Image Sensing Systems, Inc. Lender: COULEE BANK

500 Spruce Tree Centre, 1600 University St. Paul Office

St. Paul, MN 55104 1516 Losey Boulevard S

P.O. Box 845

La Crosse, WI 54601

Principal Amount: $1,742,500.00 Date of Note: December 10, 2021

PROMISE TO PAY. Image Sensing Systems, Inc. ("Borrower") promises to pay to COULEE BANK ("Lender"), or order, in lawful money of the United States of America, the principal amount of One Million Seven Hundred Forty-two Thousand Five Hundred & 00/100 Dollars ($1,742,500.00), together with interest on the unpaid principal balance from December 10, 2021, calculated as described in the "INTEREST CALCULATION METHOD" paragraph using an interest rate of 3.950%, until paid in full. The interest rate may change under the terms and conditions of the "INTEREST AFTER DEFAULT" section.

PAYMENT. Borrower will pay this loan in 59 regular payments of $10,565.88 each and one irregular last payment estimated at$1,438,255.83. Borrower's first payment is due January 10, 2022, and all subsequent payments are due on the same day of each month after that. Borrower's final payment will be due on December 10, 2026, and will be for all principal and all accrued interest not yet paid. Payments include principal and interest. Unless otherwise agreed or required by applicable law, payments will be applied first to any accrued unpaid interest; then to principal; then to any late charges; and then to any unpaid collection costs.

INTEREST CALCULATION METHOD. Interest on this Note is computed on a 365/360 basis; that is, by applying the ratio of the interest rate over a year of 360 days, multiplied by the outstanding principal balance, multiplied by the actual number of days the principal balance is outstanding. All interest payable under this Note is computed using this method. This calculation method results in a higher effective interest rate than the numeric interest rate stated in this Note.

RECEIPT OF PAYMENTS. All payments must be made in U.S. dollars and must be received by Lender at:

COULEE BANK

1516 Losey Boulevard S, P.O. Box 945

La Crosse, WI 54601

Payments must be received consistent with the following payment instructions: All loan payments must be accompanied by the account number or payment coupon provided. Loan payments may also be made by the following methods: in person at any of our branch locations; Online Banking, phone banking, mobile banking or night deposit. Payments must be received by 5 p.m., Monday through Friday (excluding bank holidays) to be credited as of that date. Payments made at the night deposit drop will be credited as of the next business day.

Lender may modify these payment instructions, including changing the address for payments, by providing updated payment instructions to Borrower in writing. If a payment is made consistent with Lender's payment instructions but received after 5:00 PM Central Time on a business day, Lender will credit Borrower's payment on the next business day.

PREPAYMENT PENALTY. Upon prepayment of this Note, Lender is entitled to the following prepayment penalty: In the event the Maker pays the loan in full prior to the maturity date, there will be a 1% pre-payment penalty on the unpaid principal balance if refinance with another financial institution. Except for the foregoing, Borrower may pay all or a portion of the amount owed earlier than it is due. Early payments will not, unless agreed to by Lender in writing, relieve Borrower of Borrower's obligation to continue to make payments under the payment schedule. Rather, early payments will reduce the principal balance due and may result in Borrower's making fewer payments. Borrower agrees not to send Lender payments marked "paid in full", "without recourse", or similar language. If Borrower sends such a payment, Lender may accept it without losing any of Lender's rights under this Note, and Borrower will remain obligated to pay any further amount owed to Lender. All written communications concerning disputed amounts, including any check or other payment instrument that indicates that the payment constitutes "payment in full" of the amount owed or that is tendered with other conditions or limitations or as full satisfaction of a disputed amount must be mailed or delivered to: COULEE BANK, St. Paul Office, 1516 Losey Boulevard S, P.O. Box 845, La Crosse, WI 54601.

LATE CHARGE. If a payment is not made on or before the 10th day after its due date, Borrower will be charged 5.000% of the unpaid portion of the regularly scheduled payment or $25.00, whichever is greater.

INTEREST AFTER DEFAULT. Upon default, including failure to pay upon final maturity, the interest rate on this Note shall be increased by 4.000 percentage points. However, in no event will the interest rate exceed the maximum interest rate limitations under applicable law.

DEFAULT. Each of the following shall constitute an event of default ("Event of Default") under this Note:

Payment Default. Borrower fails to make any payment when due under this Note.

Other Defaults. Borrower fails to comply with or to perform any other term, obligation, covenant or condition contained in this Note or in any of the related documents or to comply with or to perform any term, obligation, covenant or condition contained in any other agreement between Lender and Borrower.

Default in Favor of Third Parties. Borrower or any Grantor defaults under any loan, extension of credit, security agreement, purchase or sales agreement, or any other agreement, in favor of any other creditor or person that may materially affect any of Borrower's property or Borrower's ability to repay this Note or perform Borrower's obligations under this Note or any of the related documents.

False Statements. Any warranty, representation or statement made or furnished to Lender by Borrower or on Borrower's behalf under this Note or the related documents is false or misleading in any material respect, either now or at the time made or furnished or becomes false or misleading at any time thereafter.

Insolvency. The dissolution or termination of Borrower's existence as a going business, the insolvency of Borrower, the appointment of a receiver for any part of Borrower's property, any assignment for the benefit of creditors, any type of creditor workout, or the commencement of any proceeding under any bankruptcy or insolvency laws by or against Borrower.

Creditor or Forfeiture Proceedings. Commencement of foreclosure or forfeiture proceedings, whether by judicial proceeding, self-help, repossession or any other method, by any creditor of Borrower or by any governmental agency against any collateral securing the loan. This includes a garnishment of any of Borrower's accounts, including deposit accounts, with Lender. However, this Event of Default shall not apply if there is a good faith dispute by Borrower as to the validity or reasonableness of the claim which is the basis of the creditor or forfeiture proceeding and if Borrower gives Lender written notice of the creditor or forfeiture proceeding and deposits with Lender monies or a surety bond for the creditor or forfeiture proceeding, in an amount determined by Lender, in its sole discretion, as being an adequate reserve or bond for the dispute.

Events Affecting Guarantor. Any of the preceding events occurs with respect to any guarantor, endorser, surety, or accommodation party of any of the indebtedness or any guarantor, endorser, surety, or accommodation party dies or becomes incompetent, or revokes or disputes the validity of, or liability under, any guaranty of the indebtedness evidenced by this Note.

Change In Ownership. Any change in ownership of twenty-five percent (25%) or more of the common stock of Borrower.

Adverse Change. A material adverse change occurs in Borrower's financial condition, or Lender believes the prospect of payment or performance of this Note is impaired.

Insecurity. Lender in good faith believes itself insecure.

LENDER'S RIGHTS. Upon default, Lender may declare the entire unpaid principal balance under this Note and all accrued unpaid interest immediately due, and then Borrower will pay that amount.

ATTORNEYS' FEES; EXPENSES. Lender may hire or pay someone else to help collect this Note if Borrower does not pay. Borrower will pay Lender that amount. This includes, subject to any limits under applicable law, Lender's attorneys' fees and Lender's legal expenses, whether or not there is a lawsuit, including attorneys' fees, expenses for bankruptcy proceedings (including efforts to modify or vacate any automatic stay or injunction), and appeals. If not prohibited by applicable law, Borrower also will pay any court costs, in addition to all other sums provided by law.

JURY WAIVER. Lender and Borrower hereby waive the right to any jury trial in any action, proceeding, or counterclaim brought by either Lender or Borrower against the other.

GOVERNING LAW. This Note will be governed by federal law applicable to Lender and, to the extent not preempted by federal law, the laws of the State of Wisconsin without regard to its conflicts of law provisions. This Note has been accepted by Lender in the State of Wisconsin.

DISHONORED ITEM FEE. Borrower will pay a fee to Lender of $30.00 if Borrower makes a payment on Borrower's loan and the check or preauthorized charge with which Borrower pays is later dishonored.

RIGHT OF SETOFF. To the extent permitted by applicable law, Lender reserves a right of setoff in all Borrower's accounts with Lender (whether checking, savings, or some other account). This includes all accounts Borrower holds jointly with someone else and all accounts Borrower may open in the future. However, this does not include any IRA or Keogh accounts, or any trust accounts for which setoff would be prohibited by law. Borrower authorizes Lender, to the extent permitted by applicable law, to charge or setoff all sums owing on the indebtedness against any and all such accounts.

COLLATERAL. (To the extent not prohibited by the Wisconsin Consumer Act if this note is governed by said act) this note is secured by all existing and future security agreements and mortgages between lender and borrower, between lender and any indorser or guarantor of this note, and between lender and any other person providing collateral security for borrower's obligations, and any and all extensions, modifications, or renewal thereof, and payment may be accelerated according to any of them. I further acknowledge that future loans may be made to the borrowers, jointly or severally, which may be collateralized by the security given for this note and future security agreements and mortgages between the lender and the borrower, individually or jointly. I hereby waive, to the extent legally permitted, any requirement of notice of future loans to a borrower individually, which loans would be secured by any existing and /or future security agreements and mortgages. To the extent this note is governed by the Wisconsin Consumer Act this note shall be secured by all security agreements, mortgages and guaranties given to lender by me concurrent with the creation of this note.

SUCCESSOR INTERESTS. The terms of this Note shall be binding upon Borrower, and upon Borrower's heirs, personal representatives, successors and assigns, and shall inure to the benefit of Lender and its successors and assigns.

GENERAL PROVISIONS. This Note benefits Lender and its successors and assigns, and binds Borrower and Borrower's heirs, successors, assigns, and representatives. If any part of this Note cannot be enforced, this fact will not affect the rest of the Note. Lender may delay or forgo enforcing any of its rights or remedies under this Note without losing them. Borrower and any other person who signs, guarantees or endorses this Note, to the extent allowed by law, waive presentment, demand for payment, and notice of dishonor. Upon any change in the terms of this Note, and unless otherwise expressly stated in writing, no party who signs this Note, whether as maker, guarantor, accommodation maker or endorser, shall be released from liability. All such parties agree that Lender may renew or extend (repeatedly and for any length of time) this loan or release any party or guarantor or collateral; or impair, fail to realize upon or perfect Lender's security interest in the collateral; and take any other action deemed necessary by Lender without the consent of or notice to anyone. All such parties also agree that Lender may modify this loan without the consent of or notice to anyone other than the party with whom the modification is made. The obligations under this Note are joint and several.

PRIOR TO SIGNING THIS NOTE, BORROWER READ AND UNDERSTOOD ALL THE PROVISIONS OF THIS NOTE. BORROWER AGREES TO THE TERMS OF THE NOTE.

BORROWER ACKNOWLEDGES RECEIPT OF A COMPLETED COPY OF THIS PROMISSORY NOTE.

BORROWER:

IMAGE SENSING SYSTEMS, INC.

By:	/s/ Frank Hallowell
	Frank Hallowell, CFO of Image Sensing Systems, Inc.