QLKUNC-2400MLabear Wireless Language Education System (Master)

FCC Compliance Statement 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 ins tructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a partic ular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equi pment 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 separation 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. RF Exposure Statement: The antenna(s) used for this device must be installed to provide a separation distance of at least 20 cm from all persons and m ust not be co- located or operating in conjunction with any other antenna or transmitter. Do not Any changes or modifications to the equipment not expressly approv ed by the party responsible for compliance could void user’s authority to operate the equipment.

YUSUNG C&C CO., LTD. (137-060) 865-13, BANG BAE-DONG, SEO CHO-KU, SEOUL, KOREA PHONE : 82-2-533-6660 HTTP://WWW.YUSUNG4U.COM , [email protected] FAX : 82-2-594-4279 Date: June 2, 2006 Compliance Certification Services Certification Division 561F Monterey Road Morgan Hill, CA 95037 To whom it may concern: We, the undersigned, hereby authorize SGS Testing Korea 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 SGS Testing Korea 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 SGS Testing Korea 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; z Page 2 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 Yours, James Lee / Manager YUSUNG C&C Co., Ltd.

YUSUNG C&C CO., LTD. (137-060) 865-13, BANG BAE-DONG, SEO CHO-KU, SEOUL, KOREA PHONE : 82-2-533-6660 HTTP://WWW.YUSUNG4U.COM , [email protected] FAX : 82-2-594-4279 Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 Gentlemen: This letter is to comply with Section 0.457(d)(2)(i) and 0.459 pertaining to confidential material. We, YUSUNG C&C Co., Ltd., would like the following documents regarding this submission for FCC ID: QLKUNC-2400M to be kept confidential. 1. Schematics 2. Parts List 3. Theory of operation The above material contains trade secrets or technical data, which would customarily be guarded from competitors. We do not want these documents to be accessible to the general public. Sincerely, James Lee / Manager YUSUNG C&C Co., Ltd.

Helen Zhao Subject: FW: YUSUNG C&C Co. Ltd., FCC ID: QLKUNC-2400M, Assessment NO.: AN06T5882, Notice#1 6/22/2006 From: Kwon, James Sent: Thursday, June 22, 2006 8:22 AM To: Helen Zhao Subject: RE: YUSUNG C&C Co. Ltd., FCC ID: QLKUNC-2400M, Assessment NO.: AN06T5882, Notice#1 Hi Helen, Pls find my reply at below, and I uploaded all updated material. Thanks and have a nice day. James Kwon -----Original Message----- Sent: Wednesday, June 21, 2006 5:02 PM Subject: YUSUNG C&C Co. Ltd., FCC ID: QLKUNC-2400M, Assessment NO.: AN06T5882, Notice#1 Question #1: This is a frequency hopping device, does not use Bluetooth technology, based upon FCC15.247(a)(1), you need to address the following requirements: [James] Checked. Adopted Bluetooth technology. Described it to operating description. a) Pseudorandom Frequency Hopping Sequence Describe how the hopping sequence is generated. Provide an example of the hopping sequence channels, in order to demonstrate that the sequence meets the requirement specified in the definition of a frequency hopping spread spectrum system, found in Section 2.1. b) Equal Hopping Frequency Use Describe how each individual EUT meets the requirement that each of its hopping channels is used equally on average (e.g., that each new transmission event begins on the next channel in the hopping sequence after the final channel used in the previous transmission event). c) System Receiver Input Bandwidth Describe how the associated receiver(s) complies with the requirement that its input bandwidth (either RF or IF) matches the bandwidth of the transmitted signal. d) System Receiver Hopping Capability Describe how the associated receiver(s) has the ability to shift frequencies in synchronization with the transmitted signals. Please update Theory of Operation to add necessary information. Question #2: MPE calculation is included in the filing, but the user manual does not contain RF exposure statement, such as "To meet RF exposure requirements in FCC Rule section 1.1307, antennas must be installed so that a distance of at least 20 cm (9 inches) is maintained between antenna and all persons during normal operation, and must not be co-located or operating in conjunction with any other antenna or transmitter." Please update the user manual. [James] We updated user manual. Question #3: The test setup photos show the bandwidth test was done without any A/V device connected. Based upon ANSI C63.4:2003, section 13.1.7 Occupied bandwidth measurements, "Once the reference level is established, the equipment is conditioned with typical modulating signals to produce the worst case (i.e. the widest) bandwidth. Please retest this item with load (connection to external A/V devices). [James] We repeated test, and updated test report. Question #4: Based upon "FCC Measurement Guidelines for Frequency Hopping Spread Spectrum Systems" (Public Notice DA 00-705), a) Number of Hopping Frequencies should be tested with RBW ³ 1% of the span; - you used RBW = 100KHz when span is 84.5MHz. Please use correct setting in future. [James] Thanks. b) Band-edge Compliance of RF Conducted Emissions should be tested with RBW ³ 1% of the span; you used RBW = 100KHz when span is 25MHz. Please use correct setting in future. [James] Thanks. c) Time of Occupancy (Dwell Time) should be tested with RBW = 1 MHz; - you used RBW = 8MHz. Please repeat this test item with correct setting. [James] We repeated test, and updated test report. Question #5: Please clarity whether there is any ferrite core used on AC/DC adapter cable. [James] No. There is no ferrite core used. 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. 6/22/2006

Report File No. : STROR-06-051 Date of Issue : 2006-06-21 Page : 49 of 53 FCC ID : QLKUNC-2400M The results shown in this test report refer only to the sample(s) tested unless otherwise stated. This test report cannot be reproduced, except in full, without prior written permission of the Company. SGS Testing Korea Co., Ltd. 18-34, Sanbon-dong, Gunpo-si, Gyeonggi-do, Korea, 435-040 Tel. +82 31 428 5700 / Fax. +82 31 427 2371 www.sgstesting.co.kr 13. Attachment B – Photos of the EUT Front View of EUT Rear View of EUT Report File No. : STROR-06-051 Date of Issue : 2006-06-21 Page : 50 of 53 FCC ID : QLKUNC-2400M The results shown in this test report refer only to the sample(s) tested unless otherwise stated. This test report cannot be reproduced, except in full, without prior written permission of the Company. SGS Testing Korea Co., Ltd. 18-34, Sanbon-dong, Gunpo-si, Gyeonggi-do, Korea, 435-040 Tel. +82 31 428 5700 / Fax. +82 31 427 2371 www.sgstesting.co.kr Left View of EUT Right View of EUT

FCC ID LABEL 1. FCC ID label drawing 2. FCC ID label location YUSUNG C&C Co., Ltd. Model : UNC-2400M FCC ID : QLKUNC-2400M Made in Korea This device complies with part 15 of the FCC rules. Operation is subject to the following two conditions: (1)This devices may not cause harmful interference, and (2)This device must accept any interference received including interference that may cause undesired operation.

Report File No. : STROR-06-051 Date of Issue : 2006-06-21 Page : 51 of 53 FCC ID : QLKUNC-2400M The results shown in this test report refer only to the sample(s) tested unless otherwise stated. This test report cannot be reproduced, except in full, without prior written permission of the Company. SGS Testing Korea Co., Ltd. 18-34, Sanbon-dong, Gunpo-si, Gyeonggi-do, Korea, 435-040 Tel. +82 31 428 5700 / Fax. +82 31 427 2371 www.sgstesting.co.kr Inner of EUT Main-board Report File No. : STROR-06-051 Date of Issue : 2006-06-21 Page : 52 of 53 FCC ID : QLKUNC-2400M The results shown in this test report refer only to the sample(s) tested unless otherwise stated. This test report cannot be reproduced, except in full, without prior written permission of the Company. SGS Testing Korea Co., Ltd. 18-34, Sanbon-dong, Gunpo-si, Gyeonggi-do, Korea, 435-040 Tel. +82 31 428 5700 / Fax. +82 31 427 2371 www.sgstesting.co.kr Interface-board Audio-board Report File No. : STROR-06-051 Date of Issue : 2006-06-21 Page : 53 of 53 FCC ID : QLKUNC-2400M The results shown in this test report refer only to the sample(s) tested unless otherwise stated. This test report cannot be reproduced, except in full, without prior written permission of the Company. SGS Testing Korea Co., Ltd. 18-34, Sanbon-dong, Gunpo-si, Gyeonggi-do, Korea, 435-040 Tel. +82 31 428 5700 / Fax. +82 31 427 2371 www.sgstesting.co.kr Power-board RF Combine-board

Report File No. : STROR-06-051 Date of Issue : 2006-06-21 Page : 45 of 53 FCC ID : QLKUNC-2400M The results shown in this test report refer only to the sample(s) tested unless otherwise stated. This test report cannot be reproduced, except in full, without prior written permission of the Company. SGS Testing Korea Co., Ltd. 18-34, Sanbon-dong, Gunpo-si, Gyeonggi-do, Korea, 435-040 Tel. +82 31 428 5700 / Fax. +82 31 427 2371 www.sgstesting.co.kr 11. RF EXPOSURE EVALUATION According to FCC 1.1310 : The criteria listed in the following table shall be used to evaluate the environment impact of human exposure to radio frequency (RF) radiation as specified in § 1.1307(b) LIMITS FOR MAXIMUM PERMISSIBLE EXPOSURE (MPE) 11.1 Friis transmission formula : Pd = (Pout*G)/(4*pi*R 2 ) Where Pd = power density in mW/cm 2 Pout = output power to antenna in mW G = gain of antenna in linear scale Pi = 3.1416 R = distance between observation point and center of the radiator in cm Pd the limit of MPE, 1 mW/ cm 2 . If we know the maximum gain of the antenna and the total power input to the antenna, through the calculation, we will know the distance where the MPE limit is reached. 11.2 EUT Operating Condition A software provided by client enabled the EUT to transmit and receive data at low, middle and high channel individually. Frequency Range (MHz) Electric Field Strength(V/m) Magnetic Field Strength (A/m) Power Density (mW/cm 2 ) Average Time (A) Limits for Occupational /Control Exposures 300 – 1500 -- -- F/300 6 1500 - 100000 -- -- 5 6 (B) Limits for General Population/Uncontrol Exposures 300 – 1500 -- -- F/1500 6 1500 - 100000 -- -- 1 30 Report File No. : STROR-06-051 Date of Issue : 2006-06-21 Page : 46 of 53 FCC ID : QLKUNC-2400M The results shown in this test report refer only to the sample(s) tested unless otherwise stated. This test report cannot be reproduced, except in full, without prior written permission of the Company. SGS Testing Korea Co., Ltd. 18-34, Sanbon-dong, Gunpo-si, Gyeonggi-do, Korea, 435-040 Tel. +82 31 428 5700 / Fax. +82 31 427 2371 www.sgstesting.co.kr 11.3 Test Result of RF Exposure Evaluation Test Item ： RF Exposure Evaluation Data Test Mode ： Normal Operation 11.3.1 Output Peak Power & RF Exposure Evaluation Distance Sleeve Dipole Array Antenna gain : 4.38 dBi Channel Channel Frequency (MHz) Output Peak Power (dBm) Antenna Gain (dBi) Power Density at 20 cm (mW/cm 2 ) LIMITS (mW/cm 2 ) Low 2402 8.65 4.38 0.00400 1 Middle 2441 8.00 4.38 0.00344 1 High 2481 8.79 4.38 0.00413 1

Report File No. : STROR-06-051 Date of Issue : 2006-06-21 Page : 1 of 53 FCC ID : QLKUNC-2400M The results shown in this test report refer only to the sample(s) tested unless otherwise stated. This test report cannot be reproduced, except in full, without prior written permission of the Company. SGS Testing Korea Co., Ltd. 18-34, Sanbon-dong, Gunpo-si, Gyeonggi-do, Korea, 435-040 Tel. +82 31 428 5700 / Fax. +82 31 427 2371 www.sgstesting.co.kr TEST REPORT FCC RULES Part 15 Subpart C Report File No. : STROR-06-051 Date of Issue : 2006-06-21 Kind of Product : Labear Wireless Language Education System(Master) Model Name : UNC-2400M FCC ID : QLKUNC-2400M Manufacturer : YUSUNG C&C Co., Ltd. Serial No. : - Test Result : Complied This report details the results of the testing carried out on one sample, the results contained in this test report do not relate to other samples of the same product. The manufacturer should ensure that all products in series production are in conformity with the product sample detailed in this report. This report may only be reproduced and distributed in full. If the product in this report is used in any configuration other than that detailed in the report, the manufacturer must ensure the new system complies with all relevant standards. Any mention of SGS Testing Korea Co., Ltd. or testing done by SGS Testing Korea Co., Ltd. in connection with distribution or use of the product described in this report must be approved by SGS Testing Korea Co., Ltd. in writing. Report File No. : STROR-06-051 Date of Issue : 2006-06-21 Page : 2 of 53 FCC ID : QLKUNC-2400M The results shown in this test report refer only to the sample(s) tested unless otherwise stated. This test report cannot be reproduced, except in full, without prior written permission of the Company. SGS Testing Korea Co., Ltd. 18-34, Sanbon-dong, Gunpo-si, Gyeonggi-do, Korea, 435-040 Tel. +82 31 428 5700 / Fax. +82 31 427 2371 www.sgstesting.co.kr VERIFICATION OF COMPLIANCE Applicant : YUSUNG C&C Co., Ltd. Kind of Product : Labear Wireless Language Education System(Master) Brand Name : - Model Name : UNC-2400M Model Difference : - Report File No. : STROR-06-051 Date of test : June 01, 2006 ~ June 18, 2006 Receiver EUT : - APPLICABLE STANDARDS STANDARD TEST RESULT Part 15, Subpart B and Subpart C §15.247 Complied The above equipment was tested by SGS Testing Korea Co., Ltd. for compliance with the requirements set forth in the FCC RULES Part 15, Subpart B and Subpart C §15.247. The results of testing in this report apply to the product system that was tested only. Other similar equipment will not necessarily produce the same results due to production tolerance and measurement uncertainties. Te s t e d B y : Date June 21, 2006 Feel Jeong Approved By Date June 21, 2006 Albert Lim Report File No. : STROR-06-051 Date of Issue : 2006-06-21 Page : 3 of 53 FCC ID : QLKUNC-2400M The results shown in this test report refer only to the sample(s) tested unless otherwise stated. This test report cannot be reproduced, except in full, without prior written permission of the Company. SGS Testing Korea Co., Ltd. 18-34, Sanbon-dong, Gunpo-si, Gyeonggi-do, Korea, 435-040 Tel. +82 31 428 5700 / Fax. +82 31 427 2371 www.sgstesting.co.kr INDEX CONTENTS Page 1. GENERAL INFORMATION 4 2. CONDUCTED POWERLINE TEST 6 3. SPURIOUS EMISSION, BAND EDGE, AND RESTRICTED BAND TEST 12 4. 20 dB BANDWIDTH MEASUREMENT 24 5. MAXIMUM PEAK OUTPUT POWER MEASURMENT 27 6. FREQUENCY SEPARATION 30 7. NUMBER OF HOPPING FREQUENCY 32 8. TIME OF OCCUPANCY (DWELL TIME) 34 9. POWER SPECTRAL DENSITY MEASURMENT 41 10. ANTENNA REQUIREMENT 44 11. RF EXPOSURE EVALUATION 45 12. Attachment A – Photos of the Test Set up 47 13. Attachment B – Photos of the EUT 48 Report File No. : STROR-06-051 Date of Issue : 2006-06-21 Page : 4 of 53 FCC ID : QLKUNC-2400M The results shown in this test report refer only to the sample(s) tested unless otherwise stated. This test report cannot be reproduced, except in full, without prior written permission of the Company. SGS Testing Korea Co., Ltd. 18-34, Sanbon-dong, Gunpo-si, Gyeonggi-do, Korea, 435-040 Tel. +82 31 428 5700 / Fax. +82 31 427 2371 www.sgstesting.co.kr 1. GENERAL INFORMATION 1.1 General Description of EUT & Power Kind of Product Labear Wireless Language Education System(Master) Model Name UNC-2400M Power Supply DC 5 V /3A AC adapter Frequency Range 2402~2481 MHz(FHSS) Transmit Power 8.79 dBm (FHSS) Modulation Technique FHSS Number of Channels 80 CH (FHSS) Test Modulation Continuous RF Operating Conditions -20 °C ~ + 50 °C Antenna Type Sleeve Dipole Array Antenna(Left-handed thread SMA connector) Antenna Gain 4.38 dBi Report File No. : STROR-06-051 Date of Issue : 2006-06-21 Page : 5 of 53 FCC ID : QLKUNC-2400M The results shown in this test report refer only to the sample(s) tested unless otherwise stated. This test report cannot be reproduced, except in full, without prior written permission of the Company. SGS Testing Korea Co., Ltd. 18-34, Sanbon-dong, Gunpo-si, Gyeonggi-do, Korea, 435-040 Tel. +82 31 428 5700 / Fax. +82 31 427 2371 www.sgstesting.co.kr 1.2 Summary of Test Results The EUT has been tested according to the following specifications: APPLIED STANDARD:FCC 47 C.F.R. Part15, Subpart B and Subpart C Standard Section Test Item Result 15.107 15.207 AC Power Conducted Emission PASS 15.247(a)(1) 20 dB Bandwidth PASS 15.247(b)(1) Maximum Peak Output Power PASS 15.205(a) 15.209(a) 15.247(d) Spurious Emission, Band Edge, and Restricted Bands PASS 15.247(a)(1) Frequency Separation PASS 15.247(a)(1)(iii) Number of Hopping Frequency PASS 15.247(a)(1)(iii) Time of Occupancy (Dwell Time) PASS 15.247(e) Power Spectral Density PASS 15.247(i) 1.1307(b)(1) RF Exposure PASS Report File No. : STROR-06-051 Date of Issue : 2006-06-21 Page : 6 of 53 FCC ID : QLKUNC-2400M The results shown in this test report refer only to the sample(s) tested unless otherwise stated. This test report cannot be reproduced, except in full, without pri…

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Report File No. : STROR-06-051 Date of Issue : 2006-06-21 Page : 47 of 53 FCC ID : QLKUNC-2400M The results shown in this test report refer only to the sample(s) tested unless otherwise stated. This test report cannot be reproduced, except in full, without prior written permission of the Company. SGS Testing Korea Co., Ltd. 18-34, Sanbon-dong, Gunpo-si, Gyeonggi-do, Korea, 435-040 Tel. +82 31 428 5700 / Fax. +82 31 427 2371 www.sgstesting.co.kr 12. Attachment Photo of the test set up Report File No. : STROR-06-051 Date of Issue : 2006-06-21 Page : 48 of 53 FCC ID : QLKUNC-2400M The results shown in this test report refer only to the sample(s) tested unless otherwise stated. This test report cannot be reproduced, except in full, without prior written permission of the Company. SGS Testing Korea Co., Ltd. 18-34, Sanbon-dong, Gunpo-si, Gyeonggi-do, Korea, 435-040 Tel. +82 31 428 5700 / Fax. +82 31 427 2371 www.sgstesting.co.kr Attachment A-2 Photos of the test set up