Text extracted from the exhibit documents filed with the FCC. Open a document above to read the original.
Rev 1/26/2023 Company: DUNAN. Co., Ltd. Add: B-1303, Woolim Lions Valley 5th, 302, Galmachi-ro, Jungwon-gu, Seongnam-si, Gyeonggi-do, South Korea 462-739 Zip code: 13201 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 29-09-2025 Ref: Attestation Statements Part 2.911(d)(7) Filing Grantee Code: [WLD] Applicant FRN: [0016410029] FCC ID or: [WLD-VB60] [DUNAN. Co., Ltd.] Certifies that, as of the date of the filing of the application, [FCC US Agent, LLC] is our designated U.S. agent for service of process for the above referenced FCC ID. [DUNAN. Co., Ltd.] accepts to maintain an agent for no less than one year after the grantee has terminated all marketing and importation or the conclusion of any Commission-related proceeding involving the equipment. [FCC US Agent, LLC] accepts, as of the date of the filing of the application, the obligation of the designated U.S. agent for service of process for the above referenced FCC ID. Designated U.S. Agent Information: Name: [FCC US Agent, LLC] FRN (If the U.S. agent has an FRN): [0033402884] Address: [3722 Illinois Avenue, Saint Charles, IL, 60174, USA] Contact Person: [Tim Payne] Tel.: [708-571-3148] Email: [[email protected]] Sincerely, DUNAN. Co., Ltd. FCC US Agent, LLC KIM Taeseong Tim Payne [Insert Applicant signature] [U.S. Agent signature]
Rev 1/26/2023 DUNAN. Co., Ltd. B-1303, Woolim Lions Valley 5th, 302, Galmachi-ro, Jungwon-gu, Seongnam-si, Gyeonggi-do, South Korea 462-739 [email protected] Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 29-09-2025 Ref: Attestation Statements Part 2.911(d)(5)(i) Filing FCC ID: WLD-VB60 DUNAN. Co., Ltd. (“the applicant”) certifies that the equipment for which authorization is sought is not “covered” equipment prohibited from receiving an equipment authorization pursuant to section 2.903 of the FCC rules. DUNAN. Co., Ltd. (“the applicant”) certifies that the equipment for which authorization is sought does not include cybersecurity or anti-virus software produced or provided by Kaspersky Lab, Inc. or any of its successors and assignees, including equipment with integrated Kaspersky Lab, Inc. (or any of its successors and assignees) cybersecurity or anti-virus software pursuant to DA-24-886 and KDB 986446 D01 Covered Equipment Guidance section B(2a). Device is inherently compliant based on hardware limitations or software controls. or A Software Bill of Materials (SBOM) is provided to the TCB for review, and The end-user or third parties cannot install additional software on this device. Sincerely, KIM, TAE SEONG / Executive director DUNAN. Co., Ltd. Rev 1/26/2023 DUNAN. Co., Ltd. B-1303, Woolim Lions Valley 5th, 302, Galmachi-ro, Jungwon-gu, Seongnam-si, Gyeonggi-do, South Korea 462-739 [email protected] Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 29-09-2025 Ref: Attestation Statements Part 2.911(d)(5)(ii) Filing FCC ID: WLD-VB60 DUNAN. Co., Ltd. (“the applicant”) certifies that, as of the date of the filing of the application, the applicant is not identified on the Covered List (as a specifically named entity or any of its subsidiaries or affiliates) as an entity producing “covered” equipment. Sincerely, KIM, TAE SEONG / Executive director DUNAN. Co., Ltd.
DUNAN. Co., Ltd. B-1303, Woolim Lions Valley 5th, 302, Galmachi-ro, Jungwon-gu, Seongnam- si, Gyeonggi-do, South Korea 462-739 September 29, 2025 Federal Communications Commission Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 In re : DUNAN. Co., Ltd. FCC Application for FCC ID : WLD-VB60 To whom it may concern: We, the undersigned, hereby attest to the fact that we will apply the Supplier’s Declaration of Conformity procedure to the class A digital device portion of this composite filing. Sincerely, KIM, TAE SEONG / Executive director DUNAN. Co., Ltd.
DUNAN. Co., Ltd. B-1303, Woolim Lions Valley 5th, 302, Galmachi-ro, Jungwon-gu, Seongnam-si, Gyeonggi-do, South Korea 462-739 September 29, 2025 Federal Communications Commission Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 In re : DUNAN. Co., Ltd. FCC ID : WLD-VB60 Request for Confidentiality Pursuant to Sections 0.457 and 0.459 of the Commission’s Rules (CFR 47), DUNAN. Co., Ltd. hereby requests confidentiality and treatment of certain information accompanying this application. The materials contain trade secrets and proprietary information not customarily released to the public. The public disclosure of these matters might be harmful to the Applicant and provide unjustified benefits to its competitors. We are also hereby request Short-Term Confidentiality for 180 days after the grant as outlined in Public Notice DA 04-1705. This provision will give DUNAN. Co., Ltd. commporary confidentiality of commercially sensitive information prior to product release. The requested Confidential and Temporary Confidential exhibits are listed as follows: Exhibit Type File Name CONFIDENTIAL Schematics CONF APPENDIX WLD-VB60 SCH.pdf Parts list CONF APPENDIX WLD-VB60 PL.pdf Block diagram CONF APPENDIX WLD-VB60 Block Diagram.pdf Operational description CONF APPENDIX WLD-VB60 Operational description.pdf SHORT-TERM CONFIDENTIAL External Photos SHORT-TERM CONF WLD-VB60 EXT Photo.pdf Internal Photos SHORT-TERM CONF WLD-VB60 INT Photo.pdf Test-Setup Photos SHORT-TERM CONF WLD-VB60 Test Photo.pdf User’s Manual SHORT-TERM CONF WLD-VB60 Manual.pdf The Applicant understands that pursuant to Rule 0.457, disclosure of this application and all accompanying documentations, where applicable, will not be made public before the date of the Grant for this application. Sincerely, KIM, TAE SEONG / Executive director DUNAN. Co., Ltd.
September 29, 2025 Federal Communications Commission Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 Cover letter FCC ID : WLD-VB60 Gentlemen: 1. Variant model explanation The variant models are electrically identical to the basic model. The only difference is whether a switch is attached or not. 2. Variant model description Basic model name A simple variant model VB60 VB20 / VBS10 / VBS112 / VBS10 (The model shown on the left is VB60, and the one on the right is VB20.) Sincerely, KIM, TAE SEONG / Executive director DUNAN. Co., Ltd. DUNAN. Co., Ltd. B-1303, Woolim Lions Valley 5th, 302, Galmachi-ro, Jungwon-gu, Seongnam-si, Gyeonggi-do, South Korea 462-739
FCC ID: WLD-VB60 Copyright Ⓒ 2025, LTA Co., Ltd. SAMPLE LABEL & LOCATION DUNAN. Co., Ltd. Model : VB60 FCCID : WLD-VB60 Manufacturer : DUNAN. Co., Ltd. Made in Korea
Ref. No.: LR500112510B LP19-080(0) Copyright © 2025, LTA Co., Ltd. Page 1 of 7 243 Jubug-Ri,Yangji-Myeon, Yongin-Si, Gyeonggi-Do, Korea 17159 Tel: +82-31-323-6008 Fax: +82-31-323-6010 http://www.ltalab.com Dates of Tests: Aug 21,2025 ~ Sep 22, 2025 Test Report S/N: LR500112510B Test Site : LTA CO., LTD CERTIFICATION OF COMPLIANCE FCC ID. APPLICANT Equipment Class : Security/Remote Control Transmitter (DSC) Manufacturing Description : VelluxBell Manufacturer : DUNAN. Co., Ltd. Model name : VB60 Variant Model name : VB20 / VBS10 / VBS112 / VBS10 Test Device Serial No.: : Identical prototype Rule Part(s) : FCC Part 15 Subpart C ; ANSI C63.10 - 2020 Frequency Range : 433.05 MHz ~ 434.79 MHz Max. Output Power : Max 78.57 dBuV/m – Radiated Data of issue : Oct 01, 2025 This test report is issued under the authority of: The test was supervised by: Eun-Hwan Jung, Manager In-Sun Lee, Test Engineer WLD-VB60 DUNAN. Co., Ltd. Ref. No.: LR500112510B LP19-080(0) Copyright © 2025, LTA Co., Ltd. Page 2 of 7 Revision history Revision Date of issue Description Revised by -- Oct 01 ,2025 Initial - TABLE OF CONTENTS 1. GENERAL INFORMATION --------------------------------------------------------------------------- 2. INFORMATION ABOUT TEST ITEM --------------------------------------------------------------- 3. TEST REPORT ------------------------------------------------------------------------------------------- 3.1 SUMMARY OF TESTS ----------------------------------------------------------------------------- 3.2 RF EXPOSURE EVULATION------------------------------------------------------------------------- 3 4 5 5 6 Ref. No.: LR500112510B LP19-080(0) Copyright © 2025, LTA Co., Ltd. Page 3 of 7 1. General information 1-1 Test Performed Company name : LTA Co., Ltd. Address : 243, Jubug-ri,Yangji-Myeon,Youngin-Si, Kyunggi-Do, Korea. 449-822 Web site : http://www.ltalab.com E-mail : [email protected] Telephone : +82-31-323-6008 Facsimile : +82-31-323-6010 Quality control in the testing laboratory is implemented as per ISO/IEC 17025 which is the “General requirements for the competents of calibration and testing laboratory”. 1-2 Accredited agencies LTA Co., Ltd. is approved to perform EMC testing by the following agencies: Agency Country Accreditation No. Validity Reference RRA KOREA KR0049 - EMC accredited Lab. FCC U.S.A 649054 2027-03-29 FCC CAB VCCI JAPAN C-4948, 2026-09-10 VCCI registration VCCI JAPAN T-2416, 2026-09-10 VCCI registration VCCI JAPAN R-4483(10 m), 2026-10-15 VCCI registration VCCI JAPAN G-847 2025-12-13 VCCI registration IC CANADA 5799A-1 2026-08-15 IC filing Ref. No.: LR500112510B LP19-080(0) Copyright © 2025, LTA Co., Ltd. Page 4 of 7 2. Information about test item 2-1 Client & Manufacturer Client Company name : DUNAN. Co., Ltd. Address : B-1303, Woolim Lions Valley 5th, 302, Galmachi-ro, Jungwon-gu, Seongnam-si, Gyeonggi-do, South Korea 462-739 Tel / Fax : +82-31-715-4513 / +82-31-715-4531 Manufacturer DUNAN. Co., Ltd. Address B-1303, Woolim Lions Valley 5th, 302, Galmachi-ro, Jungwon-gu, Seongnam-si, Gyeonggi-do, South Korea 462-739 Tel / Fax +82-31-715-4513 / +82-31-715-4531 2-2 Equipment Under Test (EUT) Model name : VB60 Variant Model name : VB20 / VBS10 / VBS112 / VBS10 Serial number : Identical prototype Date of receipt : Aug 21, 2025 EUT condition : Pre-production, not damaged Antenna type : PCB Antenna (Max Gain : 0.63 dBi) Frequency Range : 433.05 MHz ~ 434.79 MHz RF output power : Max 78.57 dBuV/m – Radiated Type of Modulation : FSK Power Source : DC 12 V 2-3 Tested frequency Bluetooth LOW MID HIGH Frequency (MHz) 433.05 433.92 434.79 2-4 Ancillary Equipment Equipment Model No. Serial No. Manufacturer - - - - Ref. No.: LR500112510B LP19-080(0) Copyright © 2025, LTA Co., Ltd. Page 5 of 7 3. Test Report 3.1 Summary of tests FCC Part Section(s) Parameter Limit Test Condition Status (note 1) §1.1310 and §2.1091 RF EXPOSURE EVULATION - - C Note 1: C=Complies NC=Not Complies NT=Not Tested NA=Not Applicable - Ref. No.: LR500112510B LP19-080(0) Copyright © 2025, LTA Co., Ltd. Page 6 of 7 3.2 RF EXPOSURE EVULATION 1.1 Limit According to §1.1310 and §2.1091 RF exposure is calculated. (B) Limits for General Population/Uncontrolled Exposures Frequency range (MHz) Electric field Strength (V/m) Magnetic field Strength (A/m) Power density (mW/cm²) Averaging time (minutes) 1.34 - 30....................................... 824/f 2.19/f *(180/ f²) 30 30 - 300....................................... 27.5 0.073 0.2 30 300 - 1500.................................... ............... ............... f/1500 30 1500 - 100.000................................. ............... ............... 1.0 30 F = frequency in MHz * = Plane-wave equivalent power density 1.2 MAXIMUM PERMISSIBLE EXPOSURE Prediction Prediction of MPE limit at a given distance Power density at the specific separation: S = PG/(4R 2 π) Where, S = Maximum power density (mW/cm 2 ) P = Power input to the antenna (mW) G = Numeric power gain of the antenna R = Distance to the center of the radiation of the antenna (5 mm = limit for MPE) S = (0.001 * 1.16) / (4 * 5 2 * π) S = 0.000 000 3 mW/cm 2 Ref. No.: LR500112510B LP19-080(0) Copyright © 2025, LTA Co., Ltd. Page 7 of 7 1.3 MAXIMUM PERMISSIBLE EXPOSURE Prediction SAR Test exclusion thresholds for 100MHz to 6GHz at test separation distance ≤ 5 mm = Used [(max.power of channel, including tune-up torelance, mW)/(min. test separation distance, mm)] * [√f(GHz)] = [0.001 / 5 ] * [ √0.433 92 ] = 0.000 2 ≤ 3.0, for 1g SAR Thus, SAR for this device is not required. Max Peak output Power at antenna input terminal -28.42 dBm Max Peak output Power at antenna input terminal 0.001 mW Prediction distance 5 mm Prediction frequency 433.92 MHz Antenna Gain(typical) 0.63 dBi Antenna Gain(numeric) 1.16 -
PRODUCT SPECIFICATION APPROVALREMARKAPPENDIX DESIGNEDCHECKEDAPPROVED 2017.08.142025.08.142025.08.14 TS.KIMTS.KIMTS.KIM ModelDescription VB60_ANT 433.05MHz ~ 434.79MHz RevisionDateContents of Revision ChangeRemark 1.0’25.08.14First release Revision History SPECIFICATION MODELVB60_ANTREV. No.Rev 1.0 REG. DATE2025.08.14PAGE6 REV. DATE--- ANTENNA SPECIFICATION DUNAN. Co., Ltd. B-1303, 5th WoorimLionsValley, 144-3 Sangdaewon-dong, Jungwon-gu, Seongnam-si, Gyeonggi-do, Korea TEL : +82-31-715-4513 FAX : +82-31-715-4531 1.Model : VB60_ANT 2.Application : 433.05MHz ~ 434.79MHz compliant RF Transceiver 3.Electrical specification and performance 4. Hardware specification and mechanical 5. Company information ELECTRICAL DATASPECIFICATIONSREMARK FREQUENCY RANGE433.05MHz ~ 434.79MHz IMPEDANCE50 ΩNOMINAL PEAKGAIN_ANT_E 433.05MHz ~ 434.79MHz -0.08~-0.27 dBi#1. Attached PEAK GAIN_ANT_H 433.05MHz ~ 434.79MHz 0.46~0.63 dBi#2. Attached MECHANICALSPECIFICATIONSREMARK Dimension76.35mm x 51.8mm#3. Attached 6. OPERATING TEMPERATURE 7. HUMIDITY Condition Condition : 80% / ＋30°C ~ +50 °C Measuring method Antenna is placed in climatic chamber for 48 hours. Antenna is taken out from the chamber and measured after another 24 hours in room temperature Demands : No visual and mechanical changes. Unchanged mechanically during the test. The antenna shall satisfy the electrical data. Temperature : －20°C / ＋60°C Demands : Set Antenna for 48 hours each temperature. No visual and mechanical changes. Unchanged mechanically during the test. The antenna shall satisfy the electrical data #1. Attached_VB60 ANT_E ▪Radiation Pattern and Gain TEST METHOD ⑤ ④ ③ ② ① ① Network Analyzer ② Signal Interface : Coaxial Cable ③ Test PCB Antenna ④ Dual Polarized Antenna ⑤ Shield Room #2. Attached_VB60 ANT_H ▪Radiation Pattern and Gain TEST METHOD ⑤ ④ ③ ② ① ① Network Analyzer ② Signal Interface : Coaxial Cable ③ Test PCB Antenna ④ Dual Polarized Antenna ⑤ Shield Room #3. Attached: Drawing paper
Ref. No.: LR500112510A LP19-080(0) Copyright © 2025, LTA Co., Ltd. Page 1 of 23 243 Jubug-Ri,Yangji-Myeon, Yongin-Si, Gyeonggi-Do, Korea 17159 Tel: +82-31-323-6008 Fax: +82-31-323-6010 http://www.ltalab.com Dates of Tests: Aug 21,2025 ~ Sep 22, 2025 Test Report S/N: LR500112510A Test Site : LTA CO., LTD. CERTIFICATION OF COMPLIANCE FCC ID. APPLICANT Equipment Class : Security/Remote Control Transmitter (DSC) Manufacturing Description : VelluxBell Manufacturer : DUNAN. Co., Ltd. Model name : VB60 Variant Model name : VB20 / VBS10 / VBS112 / VBS10 Test Device Serial No.: : Identical prototype Rule Part(s) : FCC Part 15 Subpart C ; ANSI C63.10 - 2020 Frequency Range : 433.05 MHz ~ 434.79 MHz Max. Output Power : Max 78.57 dBuV/m – Radiated Data of issue : Oct 01, 2025 This test report is issued under the authority of: The test was supervised by: Eun-Hwan Jung, Manager In-Sun Lee, Test Engineer WLD-VB60 DUNAN. Co., Ltd. Ref. No.: LR500112510A LP19-080(0) Copyright © 2025, LTA Co., Ltd. Page 2 of 23 Revision history Revision Date of issue Description Revised by -- Oct 01 ,2025 Initial - TABLE OF CONTENTS 1. GENERAL INFORMATION -------------------------------------------------------------------------- 2. INFORMATION ABOUT TEST ITEM ------------------------------------------------------------- 3. TEST REPORT ------------------------------------------------------------------------------------------ 3.1 SUMMARY OF TESTS ---------------------------------------------------------------------------- 3.2 TECHNICAL CHARACTERISTICS TEST ---------------------------------------------------- 3.2.1 Automatically Deactivate ------------------------------------------------------------------------- 3.2.2 20 dB Bandwidth ------------------------------------------------------------------------------------- 3.2.3 Radiated Spurious Emissions ----------------------------------------------------------------------- 3.2.4 AC Conducted Emissions --------------------------------------------------------------------------- APPENDIX APPENDIX TEST EQUIPMENT USED FOR TESTS -------------------------------------------- 3 4 5 5 6 6 9 12 21 22 Ref. No.: LR500112510A LP19-080(0) Copyright © 2025, LTA Co., Ltd. Page 3 of 23 1. General information 1-1 Test Performed Company name : LTA Co., Ltd. Address : 243, Jubug-ri,Yangji-Myeon,Youngin-Si, Kyunggi-Do, Korea. 17159 Web site : http://www.ltalab.com E-mail : [email protected] Telephone : +82-31-323-6008 Facsimile +82-31-323-6010 Quality control in the testing laboratory is implemented as per ISO/IEC 17025 which is the “General requirements for the competents of calibration and testing laboratory”. 1-2 Accredited agencies LTA Co., Ltd. is approved to perform EMC testing by the following agencies: Agency Country Accreditation No. Validity Reference RRA KOREA KR0049 - EMC accredited Lab. FCC U.S.A 649054 2027-03-29 FCC CAB VCCI JAPAN C-4948, 2026-09-10 VCCI registration VCCI JAPAN T-2416, 2026-09-10 VCCI registration VCCI JAPAN R-4483(10 m), 2026-10-15 VCCI registration VCCI JAPAN G-847 2025-12-13 VCCI registration IC CANADA 5799A-1 2026-08-15 IC filing Ref. No.: LR500112510A LP19-080(0) Copyright © 2025, LTA Co., Ltd. Page 4 of 23 2. Information about test item 2-1 Client & Manufacturer Client Company name : DUNAN. Co., Ltd. Address : B-1303, Woolim Lions Valley 5th, 302, Galmachi-ro, Jungwon-gu, Seongnam-si, Gyeonggi-do, South Korea 462-739 Tel / Fax : +82-31-715-4513 / +82-31-715-4531 Manufacturer DUNAN. Co., Ltd. Address B-1303, Woolim Lions Valley 5th, 302, Galmachi-ro, Jungwon-gu, Seongnam-si, Gyeonggi-do, South Korea 462-739 Tel / Fax +82-31-715-4513 / +82-31-715-4531 2-2 Equipment Under Test (EUT) Model name : VB60 Variant Model name : VB20 / VBS10 / VBS112 / VBS10 Serial number : Identical prototype Date of receipt : Aug 21, 2025 EUT condition : Pre-production, not damaged Antenna type : PCB Antenna (Max Gain : 0.63 dBi) Frequency Range : 433.05 MHz ~ 434.79 MHz RF output power : Max 78.57 dBuV/m – Radiated Type of Modulation : FSK Power Source : DC 12 V 2-3 Tested frequency LOW MID HIGH Frequency (MHz) 433.05 433.92 434.79 2-4 Ancillary Equipment Equipment Model No. Serial No. Manufacturer - - - - Ref. No.: LR500112510A LP19-080(0) Copyright © 2025, LTA Co., Ltd. Page 5 of 23 3. Test Report 3.1 Summary of tests FCC Part Section(s) Parameter Test Condition Status (note 1) 15.231(a) Automatically Deactivate Conducted C 15.231(c) 20 dB Bandwidth C 15.209, 15.231(b) Radiated Spurious Emissions Radiated C 15.207 AC Conducted Emissions Conducted N/A 15.203 Antenna requirement - C N/A : This product is only operated with DC voltage. The above equipment was tested by LTA Co., Ltd. The test data, data evaluation, test procedures, and equipment configurations shown in this report were made in accordance with the procedures given in ANSI C63.10-2020 and the energy emitted by the sample EUT tested as described in this report is in compliance with the requirements of FCC Rules Part 2 and Part 15.231 The test results of this report relate only to the tested sample identified in this report. → Antenna Requirement DUNAN. Co., Ltd. FCC ID: WLD-VB60 unit complies with the requirement of §15.203. The antenna type is PCB Antenna Ref. No.: LR500112510A LP19-080(0) Copyright © 2025, LTA Co., Ltd. Page 6 of 23 3.2 Technical Characteristics Test 3.2.1 Automatically Deactivate Procedure: The transmitter output was conneted to the spectrum analyzer through an attenuator, the path loss was compensated to the results for each measurement. Set to the maximum power setting and enable the EUT transmit continuously. The spectrum analyzer is set to: Center frequency = the highest, middle and the lowest channels RBW = 100 kHz Span = 0 VBW = 3 X RBW Sweep = auto Trace = Single Detector function = peak Measurement Data : Complies Time of Transmitting [sec] Limit [sec] Result 0.638 5.000 Pass 0.598 5.000 Pass 0.647 5.000 Pass Ref. No.: LR500112510A LP19-080(0) Copyright © 2025, LTA Co., Ltd. Page 7 of 23 [LOW] [M…
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| # | Rule Parts | Frequency Range | Power Output |
|---|---|---|---|
| 1 | 15.231 | 433.05 MHz - 434.79 MHz | - |