CCEWLO24TXWireless Observation System

Class B device NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: -Reorient or relocate the receiving antenna. -Increase the se paration between the equipment and receiver. -Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. -Consult the dealer or an experienced radio/TV technician for help. [ CAUTION ] Changes or modifications not expressly approved by the manufacturer responsible for compliance could void the user's authority to operate the equipment. [FCC compliance Information] This device complies with part 15 of FCC Rules. Operation is subject to the following two conditions: 1. This device may not cause harmful interference, and 2. This device must accept any interference received. Including interference that may cause undesired operation. [FCC WARNING] This equipment may generate or use radio frequency energy. Changes or modifications to this equipment may cause harmful interference unless the modifications are expressly approved in the instruction manual. The user could lose the authority to operate this equipment if an unauthorized change or modification is made. Specification ± ± ± ± ± ± ± ±

COMMAX Co.,Ltd. Date: May , 3, 2007 Compliance Certification Services Certification Division 561F Monterey Road Morgan Hill, CA 95037 To whom it may concern: We, the undersigned, hereby authorize CTK Co., Ltd., to act on our behalf in all manners relating to application for equipment authorization, including signing of all documents relating to these matters. Any and all acts carried out by CTK Co., Ltd. on our behalf shall have the same effect as acts of our own. We, the undersigned, hereby certify that we are not subject to a denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 853(a). In authorizing CTK Co., Ltd. as our agent, we still recognize that we are responsible to: a) comply with the relevant provisions of the certification program; b) make all necessary arrangements for the conduct of the evaluation, including provision for examining documentation and access to all areas, records (including internal audit reports) and personnel for the purposes of evaluation (e.g. testing, inspection, assessment, surveillance, reassessment) and resolution of complaints; c) make claims regarding certification only in respect of the scope for which certification has been granted; d) do not use our product certification in such a manner as to bring the Certification Division into disrepute and not make any statement regarding our product certification which the Certification Division may consider misleading or unauthorized; e) upon suspension or cancellation of certification, discontinue use of all advertising matter that contains any reference thereto and return any certification documents as required by the Certification Division; f) use certification only to indicate the products are certified as being in conformity with specified standards; g) endeavor to ensure that no certificate or report nor any part thereof is used in a misleading manner; h) ensure that any reference to our product certification in communication media such as documents, brochures or advertising, complies with the requirements of the Certification Division; i) keep a record of all complaints made known to the us relating to the product’s compliance with requirements of the relevant standard and to make these records available to the Certification Division when requested; j) take appropriate action with respect to such complaints and any deficiencies found in products or services that affect compliance with the requirements for certification; k) document the actions taken. This authorization is valid until further written notice from the applicant. Sincerely, __________________________ Ji-Soo, KIM R&D / Assistant Manager

513-11, Sangdaewon-Dong, Jungwon-Gu, Sungnam- Si, Kyunggi-Do, KOREA Tel No : +82-31-739-3682 Fax No : +82-31-218-3649 May 2 , 2007 Federal Communications Commission Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 In re : COMMAX Co.,Ltd. FCC ID : CCEWLO24TX Request for Confidentiality Gentlemen: Pursuant to Sections 0.457 and 0.459 of the Commission’s Rules, we hereby request confidential treatment of information accompanying this application as outlined below: Schematics, Block diagram and Operational description. The above materials contain trade secrets and proprietary information not customarily released to the public. The public disclosure of these materials may be harmful to the applicant and provide unjustified benefits to its competitors. The applicant understands that pursuant to Section 0.457 of the Rules, disclosure of this application and all accompanying documentation will not be made before the date of the Grant for this application. Sincerely, __________________________ Ji-Soo, KIM R&D / Assistant Manager

1 Helen Zhao Subject: FW: COMMAX Co., Ltd., FCC ID: CCEWLO24TX, Assessment NO.: AN07T6788, Notice#1 sample_invoice.pdf[WLO24TX] chematics_revised.p [WLO24TX] Op Discription2_revi... [WLO24TX] User menual_revised.... [WLO24TX] Int Photo_revised.pd... From: niky5784 Sent: Wednesday, May 09, 2007 8:00 PM To: Helen Zhao Subject: RE: COMMAX Co., Ltd., FCC ID: CCEWLO24TX, Assessment NO.: AN07T6788, Notice#1 Dear Helen The attached files is revised documents that you required I hope that this is settled well without problem Thanks for your help Best regards, Hyun Chae -----Original Message----- Sent: Wednesday, May 09, 2007 4:53 PM Subject: COMMAX Co., Ltd., FCC ID: CCEWLO24TX, Assessment NO.: AN07T6788, Notice#1 Question #1: The operational description 2 is a document to explain the receiver module, this filing is for a TX. Please provide correct operational description for a transmitter module. Question #2: Please indicate TX module on the schematics. Please also indicate the antenna location on the schematics and on the internal photos. Question #3: The user manual contains an incomplete 15.21 statement which may cause the confusion: "Caution: for compliance could void the user's authority to operate the equipment. " Please note compliance should not void the user's authority to operation the equipment. Please update the manual. Question #4: The device was tested per FCC15.249, so the correct equipment class should be "DXX - Part 15 Low power communication transmitters", not "DTS - Part 15 Digital Transmission Systems", which is for 15.247 2 filings. Best Regards, Helen Zhao The items indicated above must be submitted before processing can continue on the above referenced application. Failure to provide the requested information within 30 days of the original e-mail date may result in application dismissal and forfeiture of the filing fee. Also, please note that partial responses increase processing time and should not be submitted. Any questions about the content of this correspondence should be directed to the e-mail address listed below the name of the sender.

CTK Co., Ltd. 386-1, Ho-dong, Cheoin-gu, Yongin-si, Gyeonggi-do, 449-100, Korea Tel: +82-31-339-9970 Fax: +82-31-339-9855 www.e-ctk.com FCC ID: CCEWLO24TX Page 1 of 1 EUT External Photographs

CTK Co., Ltd. 386-1, Ho-dong, Cheoin-gu, Yongin-si, Gyeonggi-do, 449-100, Korea Tel: +82-31-339-9970 Fax: +82-31-339-9855 www.e-ctk.com FCC ID: CCEWLO24TX Page 1 of 1 FCC ID label and Location

CTK Co., Ltd. 386-1, Ho-dong, Cheoin-gu, Yongin-si, Gyeonggi-do, 449-100, Korea Tel: +82-31-339-9970 Fax: +82-31-339-9855 www.e-ctk.com FCC ID: CCEWLO24TX Page 1 of 1 EUT Internal Photographs CTK Co., Ltd. 386-1, Ho-dong, Cheoin-gu, Yongin-si, Gyeonggi-do, 449-100, Korea Tel: +82-31-339-9970 Fax: +82-31-339-9855 www.e-ctk.com FCC ID: CCEWLO24TX Page 1 of 1 Soldered wire Antenna

CTK Co., Ltd. 386-1, Ho-dong, Cheoin-gu, Yongin-si, Gyeonggi-do, 449-100, Korea Tel: +82-31-339-9970 Fax: +82-31-339-9855 www.e-ctk.com Test Report No.: 2007040036 Date: April 23, 2007 Page 1 of 17 This Report shall not be reproduced except in full without the written approval of CTK Form No.: CTK-RF-EF-Part15 SubpartC(Rev.2) TEST REPORT For FCC Test Report No. : 2007040036 Date of Issue : May 4, 2007 FCC ID : CCEWLO24TX Model/Type No. : WLO24TX Kind of Product : Wireless Observation System Applicant : COMMAX Co.,Ltd. Applicant Address : 513-11, Sangdaewon-Dong, Jungwon-Gu, Sungnam-Si, Kyunggi-Do, KOREA Manufacturer : Manufacturer Address : 513-11, Sangdaewon-Dong, Jungwon-Gu, Sungnam-Si, Kyunggi-Do, KOREA Contact Person : Ji-Soo, KIM / Assitant Manager Telephone : +82-31-739-3682 Received Date : April 16, 2007 Test period : Start : April 17, 2007 End : May 3, 2007 Test Results : In Compliance Not in Compliance The test results presented in this report relate only to the object tested. CTK Co., Ltd. is accredited by Korea Laboratory Accreditation Scheme (KOLAS) which signed the International Laboratory Accreditation Cooperation (ILAC) Mutual Recognition Arrangement (MRA) for the above test item(s) and test method(s). Tested by Reviewed by Eun-Won, Lee Test Engineer Young-Joon, Park Technical Manager Date: May 4, 2007 Date: May 4, 2007 CTK Co., Ltd. 386-1, Ho-dong, Cheoin-gu, Yongin-si, Gyeonggi-do, 449-100, Korea Tel: +82-31-339-9970 Fax: +82-31-339-9855 www.e-ctk.com Test Report No.: 2007040036 Date: April 23, 2007 Page 2 of 17 This Report shall not be reproduced except in full without the written approval of CTK Form No.: CTK-RF-EF-Part15 SubpartC(Rev.2) REPORT REVISION HISTORY Date Revision Page No May 4, 2007 Issued (2007040036) All This report shall not be reproduced except in full, without the written approval of CTK Co., Ltd. This document may be altered or revised by CTK Co., Ltd. personnel only, and shall be noted in the revision section of the document. Any alteration of this document not carried out by CTK Co., Ltd. will constitute fraud and shall nullify the document. CTK Co., Ltd. 386-1, Ho-dong, Cheoin-gu, Yongin-si, Gyeonggi-do, 449-100, Korea Tel: +82-31-339-9970 Fax: +82-31-339-9855 www.e-ctk.com Test Report No.: 2007040036 Date: April 23, 2007 Page 3 of 17 This Report shall not be reproduced except in full without the written approval of CTK Form No.: CTK-RF-EF-Part15 SubpartC(Rev.2) TABLE OF CONTENTS REPORT REVISION HISTORY ..........................................................................................2 1.0General Product Description ...............................................................................4 1.1Tested Frequency .............................................................................................4 1.2Model Differences .............................................................................................5 1.3Device Modifications .........................................................................................5 1.4Peripheral Devices ............................................................................................5 1.5Calibration Details of Equipment Used for Measurement .........................................6 1.6Test Facility......................................................................................................6 1.7Laboratory Accreditations and Listings .................................................................6 2.0Summary of test Results....................................................................................7 2.1Technical Characteristic Test...............................................................................8 2.1.1Antenna Requirement..................................................................................8 2.1.2Radiated Emission Test ................................................................................9 2.1.3Conducted Emission Test ........................................................................... 14 2.1.4Band-Edge Testing .................................................................................... 15 APPENDIX A – Test Equipment Used For Tests ................................................................ 17 CTK Co., Ltd. 386-1, Ho-dong, Cheoin-gu, Yongin-si, Gyeonggi-do, 449-100, Korea Tel: +82-31-339-9970 Fax: +82-31-339-9855 www.e-ctk.com Test Report No.: 2007040036 Date: April 23, 2007 Page 4 of 17 This Report shall not be reproduced except in full without the written approval of CTK Form No.: CTK-RF-EF-Part15 SubpartC(Rev.2) 1.0 General Product Description Discription : Wireless Observation System Equipment model name : WLO24TX Serial number : Prototype EUT condition : Pre-production, not damaged Frequency Range : 2414 ~ 2468 MHz Number of channels : 4channel(2414,2432,2450,2468MHz) Type of Modulation : Frequency Modulation Power Source : 11~28VDC 1.1 Tested Frequency LOW MID HIGH Frequency (MHz) 2414 2450 2468 CTK Co., Ltd. 386-1, Ho-dong, Cheoin-gu, Yongin-si, Gyeonggi-do, 449-100, Korea Tel: +82-31-339-9970 Fax: +82-31-339-9855 www.e-ctk.com Test Report No.: 2007040036 Date: April 23, 2007 Page 5 of 17 This Report shall not be reproduced except in full without the written approval of CTK Form No.: CTK-RF-EF-Part15 SubpartC(Rev.2) 1.2 Model Differences Not applicable 1.3 Device Modifications The following modifications were necessary for compliance: Not applicable 1.4 Peripheral Devices Device Manufacturer Model No. Serial No. FCC ID or DoC Camera C O M M A X C o . , L t d . CR-ICN CT030900031 - * note : This camera is setted outside of the test site during testing CTK Co., Ltd. 386-1, Ho-dong, Cheoin-gu, Yongin-si, Gyeonggi-do, 449-100, Korea Tel: +82-31-339-9970 Fax: +82-31-339-9855 www.e-ctk.com Test Report No.: 2007040036 Date: April 23, 2007 Page 6 of 17 This Report shall not be reproduced except in full without the written approval of CTK Form No.: CTK-RF-EF-Part15 SubpartC(Rev.2) 1.5 Calibration Details of…

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CTK Co., Ltd. 386-1, Ho-dong, Cheoin-gu, Yongin-si, Gyeonggi-do, 449-100, Korea Tel: +82-31-339-9970 Fax: +82-31-339-9855 www.e-ctk.com FCC ID: CCEWLO24TX Page 1 of 1 Test Setup Photos and Configuration Radiated Electric Field Emissions