B21 Bluetooth-compatible 5.0 Audio Receiver U-Disk RCA 3.5mm AUX Jack Stereo Music Adapter

•It can connect two devices,support to connect with 3.5mm audio port and 2 RCA audio port at the same time •A built-in microphone for hands-free calls •Simple button operations to answer/hang-up calls,switch songs and adjust volume •Ultra-compact and lightweight for convenient use with a variety of devices •Upgraded to support U Disk play •No built-in battery,powered by USB Specification: •Support devices: support two mobile phones to connect •Bluetooth-compatible version: 5.0 •Output interface: 3.5mm stereo RCA left and right channels •Function: support U disk,hands-free call,NFC connection •Bluetooth-compatible protocol: AVRCP,A2DP •Frequency range: 2400-2483.5MHz •Frequency response: 20Hz-20kHz •Output power: 28mW RL=16Ω •Signal to noise ratio: >90dB •Total harmonic distortion: <0.1% •Forward transmission distance: 10 meters •Power supply: Micro USB interface 5V power supply •Size: 78*48*18mm Package included: •1 x Bluetooth-compatible Audio Receiver •1 x Power Cable •1 x Audio Cable •1 x RCA Cable •1 x English and Chinese User Manual •Other items not included