Exhibit (a)(1)(v)

Offer To Purchase For Cash

All Outstanding Shares of Common Stock

(Including the Associated Stock Purchase Rights)

of

Technology Research Corporation

$7.20 Net Per Share

By

Clearwater Acquisition I, Inc.

A Wholly Owned Subsidiary of

Coleman Cable, Inc.

To Our Clients:

Enclosed for your consideration are the Offer to Purchase, dated April 12, 2011 and the related Letter of Transmittal (which, together with any amendments or supplements thereto, collectively constitute the “Offer”) in connection with the offer by Clearwater Acquisition I, Inc. (the “Purchaser”), a Florida corporation and a wholly owned subsidiary of Coleman Cable, Inc. (“Coleman”), a Delaware corporation, to purchase all outstanding shares of common stock, par value $0.51 per share (together with the associated stock purchase rights, the “Shares”), of Technology Research Corporation, a Florida corporation (the “Company”), at $7.20 per Share, net to the seller in cash, without interest and less any required withholding taxes, upon the terms and subject to the conditions set forth in the Offer to Purchase and the related Letter of Transmittal. We are the holder of record of Shares held for your account. A tender of such Shares can be made only by us as the holder of record and pursuant to your instructions. The Letter of Transmittal is furnished to you for your information only and cannot be used by you to tender Shares held by us for your account.

We request instructions as to whether you wish us to tender any or all of the Shares held by us for your account, upon the terms and subject to the conditions set forth in the Offer to Purchase and the related Letter of Transmittal.

Your attention is directed to the following:

1. The tender price is $7.20 per Share, net to you in cash, without interest and less any required withholding taxes.

2. The Offer and withdrawal rights expire at 12:00 Midnight, New York City time, on Friday, May 13, 2011 (which is the end of the day on May 13, 2011), unless extended (as extended, the “Expiration Date”).

3. The Offer is conditioned upon, among other things, there being validly tendered and not withdrawn before the expiration of the Offer a number of Shares which, together with the shares then owned by Coleman and its subsidiaries (including the Purchaser), represents at least a majority of the total number of shares outstanding on a fully diluted basis.

4. The Offer is not conditioned on the Purchaser obtaining financing.

5. Any stock transfer taxes applicable to the sale of Shares to the Purchaser pursuant to the Offer will be paid by the Purchaser, except as otherwise provided in Instruction 6 of the Letter of Transmittal.

If you wish to have us tender any or all of your Shares, please so instruct us by completing, executing, detaching and returning to us the instruction form below. An envelope to return your instructions to us is enclosed. If you authorize tender of your Shares, all such Shares will be tendered unless otherwise specified on the instruction form. Your instructions must be forwarded to us in ample time to permit us to submit a tender on your behalf by the Expiration Date.

The Offer is not being made to, nor will tenders be accepted from or on behalf of, holders of Shares in any jurisdiction in which the making of the Offer or acceptance thereof would not be in compliance with the laws of such jurisdiction.

Payment for Shares purchased pursuant to the Offer will be made in all cases only after timely receipt by BNY Mellon Shareowner Services (the “Depositary”) of (i) certificates representing the Shares tendered or timely confirmation of the book-entry transfer of such Shares into the account maintained by the Depositary at The Depository Trust Company (the “Book-Entry Transfer Facility”), pursuant to the procedures set forth in “The Offer — 3. Procedure for Tendering Shares” of the Offer to Purchase, (ii) the Letter of Transmittal (or a facsimile thereof), properly completed and duly executed, with any required signature guarantees or an Agent’s Message (as defined in the Offer to Purchase), in connection with a book-entry delivery, and (iii) any other documents required by the Letter of Transmittal. Accordingly, payment may not be made to all tendering shareholders at the same time depending upon when certificates for or confirmations of book-entry transfer of such Shares into the Depositary’s account at the Book-Entry Transfer Facility are actually received by the Depositary. Under no circumstances will interest be paid on the purchase price for the Shares, regardless of any extension or amendment to the Offer or any delay in making payment for the Shares.

2

Instruction Form With Respect to

Offer To Purchase For Cash

All Outstanding Shares of Common Stock

(Including the Associated Stock Purchase Rights)

of Technology Research Corporation

$7.20 Net Per Share

By

Clearwater Acquisition I, Inc.

A Wholly Owned Subsidiary of

Coleman Cable, Inc.

The undersigned acknowledge(s) receipt of your letter and the enclosed Offer to Purchase, dated April 12, 2011, and the related Letter of Transmittal, in connection with the offer by Clearwater Acquisition I, Inc. to purchase all outstanding shares of common stock, par value $0.51 per share (together with the associated stock purchase rights, the “Shares”), of Technology Research Corporation.

This will instruct you to tender the number of Shares indicated below held by you for the account of the undersigned, upon the terms and subject to the conditions set forth in the Offer to Purchase and the related Letter of Transmittal.

Number of Shares to be Tendered:	SIGN HERE
Shares*	Signature(s)
Dated                     , 2011
	Name(s)
	Address(es)
	Zip Code
	Area Code and Telephone Number
	Taxpayer Identification or Social Security Number

Please return this form to the broker firm or other nominee maintaining your account.

^*  Unless otherwise indicated, it will be assumed that all Shares held for the undersigned’s account are to be tendered.

3