Fiio BTR3KDr. Daija VonRuedenLamar Purdy AK4377AProf. Crawford Wyman MD *2 Balanced BluetProf. Margot Rath IIDr. Brando Wuckertooth 5.0 Amp USProf. Katarina WittingB DAC,sMs. Brionna Heaney DVMupporProf. Eve Schroeder IElouise O'Connert LDAC/aptX Mrs. Noemi PriceNorris BoganHD lossless HiFiAnnalise Crist III CodeMrs. Connie GoyetteLou Beer IIIcs,HaProf. Emmalee Emard PhDnds-free CallinHallie KesslerHeidi Kiehn DVMg,2.5Miss Jacklyn Borer I/3.5mmZola Schuster

BTR3K AK4377A DAC*2 Balanced Bluetooth 5.0 Amp USB DAC, support LDAC/aptX HD lossless HiFi Codecs,Hands-free Calling with Microphone

Parameters:

Volume Adjustment: Can be adjusted independently from phone volumeBluetooth Profiles: A2DP (enhanced)，AVRCP，HFP，HSPBluetooth codec support: SBC/AAC/aptX/aptX LL/aptX HD/LDACBluetooth Chip: CSR8675DAC/Amplifier: AK4377A*2USB DAC: SupportedPower/Pairing Button: YesDedicated Pairing and Play Buttons: YesDedicated Volume Buttons: YesReception Range: Approx. 30 m (unobstructed)，LDAC (quality priority 4 m)Format Indicator:SBC：Blue、AAC：Cyan、aptX HD：YellowaptX/aptX LL：Purple、LDAC：WhiteHands-free Calling with Microphone: SupportedVoice Assistant Activation: SupportedIn-line Controls: SupportedNFC: Not supportedAudio Outputs: 2.5mm、3.5mm headphone jacksUSB Connector: Type-CBattery: 330mAhBattery Life: Approx. 11 hoursCharging Time: 1.5 hoursCheck battery on iOS device: Supported (Android device support for functionality will vary)Auto Standby if no audio signal: SupportedDimensions: 58×25×11mmWeight: 23.5gIncluded in Package: Manual and warranty Card, USB Type-C cable, rear clip, lanyard

Feature：

- Incredible performance gains- Now with balanced and SE output- Robust, full-bodied sound High performance AK4377A DACs- Independent dual crystal oscillators for accurate audio reproduction -Adapts to various kinds of wired headphones- Qualcomm CSR8675 Flagship-level Bluetooth abilities- Quick and convenient volume control- Can be adjusted independently from phone volume