GR11-JL Wireless Bluetooth-compatible 5.3 Adapter Metal Audio Receiver Transmitter Support 2 Phones Unique appearance design,aluminum alloy frame material,durable to use Long battery life playback time,13 hours in receiving mode and 6 hours in transmitting mode Device memory function,automatic reconnection upon startup With volume memory function Multifunctional use for home audio and video such as mobile phones,computers,Bluetooth-compatible headsets,etc. The transmission is clear,the sound quality is pleasant,and the signal is stable Built-in microphone,answer/reject/hang up calls with one click Supports one to two,you can connect two mobile phones at the same time Digital display of battery power You can switch between Bluetooth-compatible transmitter and Bluetooth-compatible receiver with one click Specification: Bluetooth-compatible version: 5.3 Power supply interface: Type-C Input interface: 3.5mm audio Transmission distance: 10m (unobstructed) Supported protocols: A2DP/AVRCP/HFP/HSP/SBC Frequency range: 2400MHZ-2483.5MHZ Frequency response: 20HZ-20KHz Package included: 1 x Bluetooth-compatible Adapter 1 x Charging Cable 1 x 3.5mm Metal Plug 1 x English User Manual