2BA4B-OPENBUDSOPEN TWS EARPHONE

Shenzhen Daikang Technology Co., Ltd.

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Application Details

Equipment Class: DSS - Part 15 Spread Spectrum Transmitter
Date of Grant: May 28, 2023
Application Purpose: Original Equipment
Date of Application: May 28, 2023
Equipment Note: OPEN TWS EARPHONE
Frequency Range: 2402.00000000 - 2480.00000000
Company: Shenzhen Daikang Technology Co., Ltd.
Country: China

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Users Manual

Ɤ䭽 .'#ꝶ 羭劼⯎歏傞♶❭抧 ⯎歏➩ざ渷た綁抧䌢❭♲猲կ 紤抧䢨꡸ ⯎忘歏 綁抧䌢❭կ ⯎歏➩ざ渷た 㥵卓唬崵ⵌ羭劼⟣䠑♧鴝⯎歏剣䒗暟 ⯎歏渱紤抧䘯꡸䫣险姼㢅⚹偽絁⯎歏勹㚖 ♶⯈雽剣䒗暟կ ⯎歏➩䭷爙抧 ⯎歏〡歏寑碫㘗 〳⯎歏翸ざ暟Ꝋ歏寑 ⯎歏➩䒓渷 羭劼示〳荈⸓䒓劼կ 羭劼㖈⯎歏➩ 䩧䒓⯎歏➩♳渷 ⥗羭劼荈⸓䒓劼 綁抧꡸捌 䒓劼た⥗羭劼荈⸓ 絆ꢭ 絆ꢭ㸤䧭た⚺羭⠔紤綁抧❜剏꡸捌 鵳Ⰶꂁ㼆朐䙖կ ♸ 劼羭た 갉 爙䲿 ⵌ ゑ  㼆 ꂁ 䎇䭊鷥  0QFO#VET"JS  獦ぜ㢊霃程䵂  暅覰劼䩛䒓䩧䩛劼鵶䱹䧭⸆կ 羭劼佞㔐⯎歏➩ⰻ ざ♳渷㶩 羭劼Ⱒ劼䎇鵳Ⰶ⯎歏朐䙖կ 㢊岤 露鎊⸔䩛꨽銳霃㢊佅䭯 罜⚂銳㖈霃㢊畮䩧䒓露갉⸔䩛勉ꣳկ 䒓渷荈⸓䒓劼ざ渷荈⸓Ⱒ劼 ❡ᄩ㘗〿 0QFO#VET 01&/584&"31)0/&0QFO#VET䒓佞䒭覰暅羭劼 0QFO#VET"JS 0QFO#VET"JS Touch Button Function Charging case indicator light Charging port Indicator light MFB Button Package list 堤腊ٝةن Product information Kindly tips Operating instructionPower onţƸĘƆţǘ(1) Open the charging case and the earbuds will Auto Power on.ɣǧɤÎĵĘřƗĵĘĘîƆĊƝđƍîƆĘƃţƸĘƆĘđţǘîřđřţƗĹřƗĵĘċĵîƆĮĹřĮċîƍ ĘɏőţřĮƃƆĘƍƍ the MFB button for 3 seconds to powered on the earbuds automatically. Automatically connect backǦɎÎĵĘřƾţƝƃţƸĘƆţřƗĵĘĵĘîđƍĘƗɏĹƗƸĹőőîƝƗţŘîƗĹċîőőƾƃîĹƆîřđ ċţřřĘċƗƗţƗĵĘ paired Bluetooth device.ǧɎÎĵĘřċţřřĘċƗĘđɏĹĭƗĵĘĘǘĘċƗĹƷĘđĹƍƗîřċĘĹƍĘƽċĘĘđĘđɏƗĵĘĘîƆ ƃĵţřĘƸĹőőîƝƗţŘîƗĹċîőőƾ ċţřřĘċƗƗţƗĵĘŘţĊĹőĘƃĵţřĘîĭƗĘƆƆĘƗƝƆřĹřĮƗţƗĵĘĘǘĘċƗĹƷĘđĹƍ ƗîřċĘƸĹƗĵĹřǧŘĹřƝƗĘƍɎ Answer the phoneÎĵĘřîċîőőċţŘĘƍĹřɏċőĹċŎƗĵĘnD ĊƝƗƗţřƗţîřƍƸĘƆƗĵĘċîőőɎHang up the phone'ƝƆĹřĮƗĵĘċîőőɏċőĹċŎƗĵĘnD ĊƝƗƗţřƗţĵîřĮƝƃƗĵĘċîőőɎReject callÎĵĘřîċîőőċţŘĘƍĹřɏőţřĮƃƆĘƍƍƗĵĘnD ĊƝƗƗţřĭţƆîĊţƝƗǧƍĘċ ţřđƍƗţƆĘŊĘċƗƗĵĘċîőőɎ music play/pauseÎĵĹőĘŘƝƍĹċĹƍƃőîƾĹřĮɜƃîƝƍĹřĮɏċőĹċŎƗĵĘnD ĊƝƗƗţřţřċĘƗţƃ îƝƍĘţƆƃőîƾƗĵĘŘƝƍĹċɎ Chinese-English voice switchingÎĹƗĵĊţƗĵĘîƆƃĵţřĘƍƃîĹƆĘđîřđđţřʃƗċţřřĘċƗĘđƗţƗĵĘƃĵţřĘɏċő ĹċŎƗĵĘnD ĊƝƗƗţř 4 times to switch the Chinese-English voice mode. ɣǦɤƝƗƗĵĘĘîƆƃĵţřĘĊîċŎĹřƗţƗĵĘċĵîƆĮĹřĮċîƍĘɏċőţƍĘƗĵĘċţƷ ĘƆɏĹƗƸĹőőƝƗţ ƃţƸĘƆţǘƗĵĘîřđƍƗîƆƗċĵîƆĮĹřĮɎɣǧɤÎĵĘřƗĵĘĵĘîđƃĵţřĘĹƍƗƝƆřĘđţřɏőţřĮƃƆĘƍƍƗĵĘnD ĊƝƗƗţř ĭţƆǪƍĘċţřđƍ to shut down manually Product Model: OpenBuds őƝĘƗţţƗĵÍĘƆƍĹţřɐ ǪɎǨFrequency Rrange: 20Hz-20KHz0ǘĘċƗĹƷĘÎĹƆĘőĘƍƍîřĮĘɐǦǥŘĘƗĘƆƍRated voltage: 3.7V0ƽƗĘƆřîőƷţőƗîĮĘɐ'!ǩɎǭÍɩǪɎǪÍBattery Type: Rechargeable polymer Lithium BatterySupporting Protocol: HSP / HFP /A2DP/ AVRCP ƍƍĵţƸřĹřDĹĮƝƆĘǦɏoyîőőţƸĘđĭţƆĘĹĮřċţƷĘƆthe batteries wireless charging area while charging. Pairing connectionǦɎyƃĘřƗĵĘċţƷĘƆţĭƗĵĘċĵîƆĮĹřĮċîƍĘîřđƗîŎĘţƝƗƗĵĘĘîƆƃĵţř ĘƍɏĵĘĘîƆƃĵţřĘƍƸĹőő îƝƗţƃţƸĘƆţřîřđƗĵĘĮƆĘĘřőĹĮĵƗƸĹőőǜîƍĵɎĭƗĘƆƃţƸĘƆţřɏ ƗĵĘƗƸţĘîƆƃĵţřĘƍƸĹőő auto form a team.ǧɎƝƆřţřƗĵĘĊőƝĘƗţţƗĵĭƝřċƗĹţřţĭƗĵĘŘţĊĹőĘƃĵţřĘɏƍĘîƆċĵĭ ţƆƗĵĘđĘƷĹċĘřîŘĘ " 0QFO#VET"JS ʂţřƾţƝƆƃĵţřĘɏċőĹċŎĹƗɎĭƗĘƆîřđőĹƍƗĘřƗţƗĵĘƍţƝřđţĭƗĵĘ ċţřřĘċƗĹţřɏƗĵĘĵĘîđƍĘƗĹƍƍƝċċĘƍƍĭƝőőƾċţřřĘċƗĘđƗţƗĵĘŘţĊĹő ĘƃĵţřĘɎ Previous song /Next songÎĵĘřƃőîƾĹřĮɏđţƝĊőĘɩċőĹċŎƗĵĘnD ĊƝƗƗţřţřƗĵĘőĘĭƗĘîƆƗţƍƸ ĹƗċĵƗţƗĵĘƃƆĘƷĹţƝƍŘƝƍĹċɑ đţƝĊőĘɩċőĹċŎƗĵĘnD ĊƝƗƗţřţřƗĵĘƆĹĮĵƗĘîƆƗţƍƸĹƗċĵƗţƗĵĘř ĘƽƗƍţřĮɎ Volume up/downƆĹƃőĘɩċőĹċŎƗĵĘnD ĊƝƗƗţřţřƗĵĘƆĹĮĵƗĘîƆĊƝđƗţĹřċƆĘîƍĘƗĵĘ ƷţőƝŘĘɏƗƆĹƃőĘɩċőĹċŎ the MFB button on the left earbud to decrease the volume.voice assistantĭƗĘƆċţřřĘċƗĘđɏőţřĮƃƆĘƍƍnD ĊƝƗƗţřĭţƆǧƍĘċţřđƍƗţƍƝŘŘţř ƗĵĘƷţĹċĘîƍƍĹƍƗîřƗ (such as: SIRI).oţƗĘɐfîřĮƝîĮĘîƍƍĹƍƗîřƗƆĘƅƝĹƆĘƍđĘƷĹċĘƍƝƃƃţƆƗîřđřĘĘđƗţţƃĘ řƷţĹċĘîƍƍĹƍƗîřƗ permissions on the device sideEarphone chargingǦɎƝƗƗĵĘĘîƆƃĵţřĘƍĹřƗţƗĵĘċĵîƆĮĹřĮċîƍĘƗţċĵîƆĮĘɏƗĵĘőĹĮĵ ƗƸĹőőřţƗőĹĮĵƗƝƃƸĵĘř ĘîƆĊƝđƍċĵîƆĮĹřĮɏîřđƗĵĘĮƆĘĘřőĹĮĵƗƸĹőőĊĘţřĭţƆǨƍĘċţřđƍ îĭƗĘƆƗĵĘċĵîƆĮĹřĮ case is closed.ǧɎĭƗĘƆƗĵĘċĵîƆĮĹřĮċîƍĘĹƍċőţƍĘđɏĹĭîĭţƆĘĹĮřţĊŊĘċƗĹƍđĘƗ ĘċƗĘđţřĘĹƗĵĘƆƍĹđĘ ţĭƗĵĘĵĘîđƍĘƗɏƗĵĘƆĘđőĹĮĵƗţĭƗĵĘċĵîƆĮĹřĮċîƍĘƸĹőőǜîƍĵƅƝ ĹċŎőƾɎ Charging box chargingÎĵĹőĘ!ĵîƆĮĹřĮɐƗĵĘƆĘđőĹĮĵƗǜîƍĵĘƍƍőţƸőƾ  fully charged: the green light is always on. ƝƗţƃţƸĘƆţǘĵĘĘîƆĊƝđƍƸĹőőîƝƗţŘîƗĹċîőőƾţƸĘƆţǘîĭƗĘƆǪŘĹřƝƗĘƍţĭƃţƸĘ ƆţřîřđřţċţřřĘċƗĹţř ⚥薉갉㡮ⴗ׶剏ִ 刼䨲׃刼鷐׶ 갉ꆀ锄侮 زٝةأء،갉㡮 ؎َךٝم⯎ꨵ ⯎ꨵךأ٦؛⯎ꨵ ؿ٦ؔٙػח荈⹛涸 ĶŔŞŌŕŝŖŔŕŌřŏŗŔŕŝŖŔŕĻőŜőŖŗŪţŔŞŨŝū ĮŜőŒŔŘőŝśŌŜŔŎŌřŔū584ţőŞŧŜőťőŗţŖŌŖŗŌŎŔŤŌŘŔ.'#ŐŗūŜőŌŗŔœŌŢŔŔśőŜőŖŗŪţőřŔūūœŧŖŌĻŜőŐŧŐşťŌūĽŗőŐşŪťŌūśőŝřūĻŜŔŎŚŝśŜŚŔœŎőŐőřŔŔŐŎŌŒŐŧťőŗŖřŔŞőŖřŚśŖŚŕ.'#ŗőŎŚőşšŚ ŔŘş œŧŖŌ śőŜőŖŗŪţŔŞŝūřŌśŜőŐŧŐşťşŪśőŝřŪİŎŌŒŐŧťőŗŖřŔŞőśŜŌŎŚőşšŚś Ś ŖŗŌŎŔŤő.'#ŔśőŜőŖŗŪţŔŞőŝŨřŌŝŗőŐşŪťşŪśőŝřŪĺōŦőŘśŗŪŝ ŘŔřşŝĹŌŒŘŔŞőŞŜŔŜŌœŌřŌŖřŚśŖş.'#śŜŌŎŚŏŚşšŌ ţŞŚōŧşŎőŗŔţŔŞŨŏŜŚ ŘŖŚŝŞŨ řŌŒŘŔŞőŞŜŔŜŌœŌřŌŖřŚśŖş.'#ŗőŎŚŏŚşšŌ ţŞŚōŧşŘőřŨŤŔŞŨŏŜŚŘ ŖŚŝŞŨ įŚŗŚŝŚŎŚŕśŚŘŚťřŔŖĮŝŚŝŞŚūřŔŔŝŚőŐŔřőřŔū řŌŒŘŔŞőŝőŖşřŐřşŪŖŗŌŎŔŤş.'# ţŞŚō ŧŚŞśşŝŞŔŞŨ ŔŚŞŖŜŧŞŨŏŚŗŚŝŚŎŚŕśŚŘŚťřŔŖ řŌśŜŔŘőŜ4*3 ĻŜŔŘőţŌřŔőĻŚŘŚťřŔŖūœŧŖŌřşŒŐŌőŞŝūŎşŝŞŜŚŕŝŞŎőśŚŐŐőŜŒŖŔ Ō ŜŌœŜőŤőřŔő ŏŚŗŚŝŚŎŚŏŚśŚŘŚťřŔŖŌŐŚŗŒřŚōŧŞŨŎŖŗŪţőřŚřŌşŝŞŜŚŕŝŞŎőijŌŜūŐŖŌřŌşŤřŔŖŚŎĹŌşŤřŔŖŔśŚŘőťŌŪŞŝūŎœŌŜūŐřŧŕŚŞŝőŖŐŗūœŌŜūŐŖŔ řŌşŤřŔŖŔř őœŌŒŔŏŌŪŞ ŝŎőŞśŜŔœŌŜūŐŖő œőŗőřŧŕŝŎőŞţŌŝŞŚŏŚŜŔŞŎŞőţőřŔőŞŜőšŝőŖşř ŐśŚŝŗőœŌŖŜŧŞŔū ŖŜŧŤŖŔœŌŜūŐřŚŏŚŚŞŝőŖŌĻŚŝŗőœŌŖŜŧŞŔūŖŜŧŤŖŔœŌŜūŐřŚŏŚŚŞŝőŖŌ őŝŗŔŚōřŌŜşŒŔŎŌőŞŝū ŔřŚŜŚŐřŚő ŞőŗŚ œŌŜūŒŌŪťőőřŌşŤřŔŖŔŝŗŪōŚŕŝŞŚŜŚřŧ œŌŜūŐřŌūŖŚŜŚōŖŌŖŜŌ ŝřŌū ŎŝśŧŤŖŌŝŔŏřŌŗŔœŌŢŔŔijŌŜūŐŖŌœŌŜūŐřŚŏŚŚŞŝőŖŌĮœŌŜūŐŖőŘőŐŗőřřŌūŎŝśŧŤŖŌŖŜŌŝřŚŏŚŝŎőŞŌĻŚŗřŚőũŗőŖŞŜŔţőŝ ŞŎŚ œőŗőřŧŕŝŎőŞţŌŝŞŚŏŚŜŔŞĬŎŞŚŘŌŞŔţőŝŖŚőŎŧŖŗŪţőřŔőįŌŜřŔŞşŜŌŌŎŞŚŘŌŞŔţőŝŖŔŚŞŖŗŪţŔŞŝūţőŜőœŘŔřşŞśŚŝŗőŎŖŗŪţőřŔ ū ōőœśŚŐŖŗŪţőřŔū -POHQSFTTUIF.'#CVUUPO4QPXFSPO4QPXFSP .'# 醢ᄩ➬圬㛇燊涸堤腊 .'# ĴřŠŚŜŘŌŢŔūŚśŜŚŐşŖŢŔŔ ľőśŗŧŕŝŚŎőŞ ĺŝřŚŎřŧőŠşřŖŢŔŔĮŖŗŪţŔŞŨĮŧŖŗŪţŔŞŨ ijŌŜūŐřŧŕŚŞŝőŖŚŞŖŜŧŎŌőŞŖŜŧŤŖş řŌşŤřŔŖŔŘŚŏşŞŌŎŞŚŘŌŞŔţő ŝŖŔŎŖŗŪţŌŞŨŝū ĶŚŏŐŌœŌŜūŐřŧŕŚŞŝőŖŎŧŖŗŪţőř řŌŒŘŔŞőŖŗŌŎŔŤş.'#ŎŞőţőř ŔőŝőŖşřŐ ŔřŌşŤřŔŖŔōşŐşŞŎŖŗŪţőřŧŎŜşţřşŪ ĹŌşŤřŔŖŔśŚŘőťŌŪŞŝūŚōŜŌŞřŚŎœŌŜūŐřŧŕŚŞŝőŖ œŌŖŜŧŎŌŪŞŝūŖ ŜŧŤŖŚŕ řŌşŤřŔŖŔŎŧŖŗŪţŌŪŞŝūŔŎšŚŐūŞŎœŌŜūŐřŚőŝŚŝŞŚūřŔő ĹŌşŤřŔŖŔŎŧŖŗŪţŌŪŞŝūŎŜşţřşŪŎŜőŒŔŘőŎŖŗŪţőřŔū řŌŒŔŘŌūŖŗ ŌŎŔŤş .'#ŎŞőţőřŔőŝőŖşřŐľŔśśŜŚŐşŖŢŔŔ0QFO#VETĮőŜŝŔū#MVFUPPUI#5İŔŌśŌœŚřţŌŝŞŚŞ)[,)[ʼnŠŠőŖŞŔŎřŚőŜŌŝŝŞŚūřŔőŚŖŚŗŚŘőŞŜŚŎĹŚŘŔřŌŗŨřŚőřŌśŜūŒőřŔő ĮĮřőŤřőőřŌśŜūŒőřŔő%$77ľ…

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Attestation Statements

Shenzhen Daikang Technology Co., Ltd. 2.911 (d)(5)(i) Equipment Type Attestation v1.2 Section 2.911(d)(5)(i) Certification – EquipmentType Company name:Shenzhen Daikang Technology Co., Ltd. Address:Building i, No. 10, East District, Shangxue S&T Park,Bantian Street, Longgang District, Shenzhen Guangdong China 518000 Product Name:OPEN TWS EARPHONE FCCID: 2BA4B-OPENBUDS Model(s):OpenBuds, OpenBuds Air,OpenBuds Pro,G136,G137 2.911(d)(5)(i) EquipmentType We, [Shenzhen Daikang Technology Co., Ltd.] (“the applicant”) certify that the equipment for which authorization is sought through certification is not:  Prohibited from receiving an equipment authorization pursuant to § 2.903; of the FCC rules.  Identified as an equipment type in the “Covered List” NOTE 1 Yours sincerely, Name: dongwen Zhong Date: 2023/05/09 Title and Company name: Product Manager /Shenzhen Daikang Technology Co., Ltd. NOTE 1 “Covered List”; is the List of Equipment and Services Covered By Section 2 of The Secure Networks Act, available at https://www.fcc.gov/supplychain/coveredlist References; 1) 986446 D01 Covered Equipment v01 https://apps.fcc.gov/oetcf/kdb/forms/FTSSearchResultPage.cfm?switch=P&id=325672 2) Federal Register document 2022-28263 published on 02/06/23 https://www.federalregister.gov/documents/2023/02/06/2022-28263/protecting-against-national-security-threats-to-the-com munications-supply-chain-through-the

Attestation Statements

Shenzhen Daikang Technology Co., Ltd. 2.911 (d)(5)(ii) Applicant Attestation v1.2 Section 2.911(d)(5)(ii) Certification – Applicant (Covered List ) Company name:Shenzhen Daikang Technology Co., Ltd. Address:Building i, No. 10, East District, Shangxue S&T Park,Bantian Street, Longgang District, Shenzhen Guangdong China 518000 Product Name:OPEN TWS EARPHONE FCCID: 2BA4B-OPENBUDS Model(s):OpenBuds, OpenBuds Air,OpenBuds Pro,G136,G137 2.911(d)(5)(ii) Applicant filing We, [Shenzhen Daikang Technology Co., Ltd.] (“the applicant”) certify that, as of the date of the filing of the application, the applicant is not identified NOTE 1 on the “Covered List” NOTE 2 ,established pursuant to §1.50002 of this chapter,as an entity producing coveredcommunications equipment. Yours sincerely, Name: dongwen Zhong Date: 2023/05/09 Title and Company name: Product Manager / Shenzhen Daikang Technology Co., Ltd. NOTE 1 Delete option not applicable to this application. NOTE 2 “Covered List”; is the List of Equipment and Services Covered By Section 2 of The Secure Networks Act, available at https://www.fcc.gov/supplychain/coveredlist References; 1) 986446 D01 Covered Equipment v01 https://apps.fcc.gov/oetcf/kdb/forms/FTSSearchResultPage.cfm?switch=P&id=325672 2) Federal Register document 2022-28263 published on 02/06/23 https://www.federalregister.gov/documents/2023/02/06/2022-28263/protecting-against-national-security-threats-to-the-com munications-supply-chain-through-the

Attestation Statements

Shenzhen DaikangTechnology Co., Ltd. U.S.Agent Designation for Service of Process (Applicant and U.S.Agent are Separate Parties) TO: Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046, USA ATTENTION: FCC Certification – Section 2.911(d)(7) Information Designated U.S. Agent Company Name: IQUA QUDIO LIMITED FRN:0033790908 Contact Name: CHAUNGCHAO YANG Address: 5301 LIMESTONE ROAD #150 WILMINGTON,DE19808 Telephone No: （917）888-3788 Email: [email protected] This letter is to confirm that we (IQUA QUDIO LIMITED) have accepted the responsibility to act as the Designated U.S. Agent for Service of Process as required by section 47 CFR 2.911(d)(7) on behalf of the Applicant noted below. U.S.Agent Signature: Date:2023-5-9 Signed by (Printed Name/Title):CHAUNGCHAOYANG / Manager The Applicant acknowledges that they must maintain an agent for no less t han one year after terminating all marketing and importation OR the conclusion of any Commission-related proceeding involving the equipment. The applicant further acknowledges their responsibility to inform the FCC whenever the Designated U.S. Agent information above changes. Applicant Company name: Shenzhen Daikang Technology Co., Ltd. FCC ID: 2BA4B-OPENBUDS Contact Name: dongwen Zhong Address: Building i, No. 10, East District, Shangxue S&T Park, Bantian Street, Longgang District, Shenzhen Telephone No: 15016731314 Email: [email protected] Applicant Signature: Date: 2023-5-9 Signed by (Printed Name/Title): dongwen Zhong / Product Manager

Cover Letter(s)

Shenzhen Daikang Technol o g y G o .1 Ltd. Authorization Company:Shenzhe『，Daikang Technology Co., Ltd. Address:Building i, No. 10, East District, Shangxue S&T Park,Bantian Street, Longgang District, Shenzhen Guangdong China 518000 Product Name:OPEN TWS EARPHONE Model Number(s):OpenBuds, OpenBudsAir,OpenBuds Pro,G136,G137 Product Description:Bluetooth Earph。nes We authorize MiCOM Labs Inc., 575 Boulder Couirt, Pleasanton, California 94566, USA. to act on ou『behalfon all matters conce『ningthe ce时ificaitionof above named equipment. We declare that MiCOM Labs Inc. is allowed to forward all information related to the approval and ce『tificationof equipment to the regulatory agencies as required and to discuss anv issues concernina the aoo「ovalapplication. Anv and all acts carried out by MiCOM Labs on our behalf shall have the same effect as acts of our own. Signature: (Q主阶ui �n. Name: Qinghui Yan日 Title: 旦旦旦盟E Company: Shenzhen Daikang Technology Co., Ltd. Date: 202:3/Q,5./09

Cover Letter(s)

Declaration on model difference We the undersigned hereby confirm that any of our production units bearing the following model numbers are identical in circuitry and electrical, mechanical and physical construction; The difference is only in model names. FCC ID: 2BA4B-OPENBUDS Production name Trade name Model no. OPEN TWS EARPHONE N/A OpenBuds, OpenBuds Air,OpenBuds Pro,G136,G137 Confirmed by：Shenzhen Daikang Technology Co., Ltd. Signature: Date: 2023/05/09 Name: dongwen Zhong Title: Product Manager Company: Shenzhen Daikang Technology Co., Ltd.

Cover Letter(s)

Shenzhen Daikang Technology Co., Ltd. Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 2023/05/09 Subject; Request for Confidentiality FCC ID: 2BA4B-OPENBUDS To Whom It May Concern, Pursuant to the provisions of the Commission’s rules Title 47 Sections §0.457 and §0.459, we are requesting the Commission to withhold the following attachment(s) as confidential documents from public disclosure indefinitely. These documents contain detailed system and equipment descriptions and are considered as proprietary information in operation of the equipment. The public disclosure of these documents might be harmful to our company and would give competitors an unfair advantage in the market. Schematic Diagram Block Diagram Operational Description In additional to above mentioned documents, in order to comply with the marketing regulations in Title 47 CFR §2.803 and the importation rules in Title 47 CFR §2.1204, while ensuring that business sensitive information remains confidential until the actual marketing of newly authorized devices, we request Short Term Confidentiality of the following attachment(s); User Manual For 45 days, pursuant to Public Notice DA 04-1705. OR For 180 dayspursuantto KDB 726920 D01. It is our understanding that all measurement test reports, FCC ID label format and correspondence during the certification review process cannot be granted as confidential documents and this information will be available for public review once the grant of equipment authorization is issued. Sincerely, Signature: Name: dongwen Zhong Title: Product Manager Company name: Shenzhen Daikang Technology Co., Ltd.

External Photos

EUT EXTERNAL PHOTOGRAPHS EUT View 1 Right EUT View 2 EUT View 3 EUT View 4 EUT View 5 EUT View 6 EUT View 7 Left EUT View 8 EUT View 9 EUT View 10 EUT View 11 EUT View 12 EUT View 13 ----------------The end----------------

ID Label/Location Info

Dimension：5.26*30mm FCC ID: 2BA4B-OPENBUDS

Internal Photos

EUT INTERNAL PHOTOGRAPHS Left EUT Housing and Board View 1 EUT Housing and Board View 2 EUT Housing and Board View 3 EUT Housing and Board View 4 EUT Housing and Board View 5 EUT Housing and Board View 6 EUT Housing and Board View 7 Right EUT Housing and Board View 8 EUT Housing and Board View 9 EUT Housing and Board View 10 EUT Housing and Board View 11 EUT Housing and Board View 12 EUT Housing and Board View 13 EUT Housing and Board View 14 EUT Housing and Board View 15 EUT Housing and Board View 16 EUT Housing and Board View 17 EUT Housing and Board View 18 EUT Housing and Board View 19 (right) ----------------The end---------------- Antenna

RF Exposure Info

FCC ID: 2BA4B-OPENBUDS RF exposure evaluation According to§15.247(i), §1.1307 (b) and KDB447498, systems operating under the provisions of this section shall be operated in a manner that ensures that the public is not exposed to radio frequency energy level in excess of the commission’s guidance. The SAR-based exemption formula of §1.1307(b)(3)(i)(B), repeated here as Formula (B.2), applies for single fixed, mobile, and portable RF sources with available maximum time-averaged power or effective radiated power (ERP), whichever is greater, of less than or equal to the threshold Pth (mW). This method shall only be used at separation distances from 0.5 cm to 40 cm and at frequencies from 0.3 GHz to 6 GHz (inclusive). Pth is given by Formula (B.2). F is in GHz, d is the separation distance (cm), and ERP20cm is per Formula (B.1). When the minimum test separation distance is < 5 mm, a distance of 5 mm is applied to determine SAR test exclusion.We use 5mm as separation distance to calculate Antenna gain: 1.72 dBi Conducted Transmit Power Max: = -3.66dBm = 0.43 mW EIRP=-3.66dBm + 1.72 dBi=--1.94dBm ERP= -1.94-2.15dB= -4.09 dBm The maximun ERP power specified is -4.09 dBm = 0.39mW The source- based time-averaging conducted output power =0.39 * Duty factor mW (where Duty Factor≤1) = 0.39 mW The SAR Exclusion Threshold Level: 푃 th (mW) = ERP 20cm * (푑/20cm) 푥 (X= ) = 2.72 mW Since the source-based time-averaging conducted output power is well below the SAR low threshold level, so the EUT is considered to comply with SAR requirement without testing.

Test Setup Photos

TEST SETUP PHOTOGRAPHS 1.1. Photos of Radiation Emission Measurement Conducted emissions Spurious Emission Test Setup (Below 1GHz) Spurious Emission Test Setup (Above 1GHz) ----------------The end----------------