Feature:1. [2 in 1 Wireless Transmitter Receiver] Use JL chip, a Bluetooth device integrating receiving and transmitting, greatly solves the limitations of audio devices and expands the functions of various audio devices.2. [Easy Transfer] Transfer the music in your mobile phone to the audio equipment in your home, and use the TV, CD player, MP3 or any other audio equipment to send it to the Bluetooth enabled audio or headset.3. [Easy To Use] No need to drive, plug and play. Receiver transmitter mode two in one, one key to switch. Strong and durable, small and exquisite appearance, easy to carry.4. [HD Microphone] The HD microphone brings more convenient functions to users, allowing users to make and receive calls while in use. BT 5.0 technology has more stable signal transmission.5. [Wide Compatibility] For Android system, for iOS system mobile phone, tablet and other Bluetooth devices, and audio equipment with 3.5mm audio input interface.Specification:Item Type: Bluetooth 5.0 Audio Receiver TransmitterMaterial: ABSBluetooth Version: 5.0Bluetooth Protocol Support: HSP, A2DP and AVRCPTransmission Distance: More than 10m / 33ft (open place)Working Time: More than 5 hoursCharging Time: About 1 hourCharging Input Voltage: DC 5VBuilt In Lithium Battery Capacity: 220mAh (included)Input Output Connection: 3.5mm stereo interfaceMicrophone Receiving Sensitivity: -42dBCompatibility: For Android system, for iOS system mobile phone, tablet and other Bluetooth devices, and audio equipment with 3.5mm audio input interface.Package List:1 x Adapter1 x Manual 1 x Charging Cable