Feature:1. Highdefinition synchronization, low sound delay, improve the endtoend speed of audio transmission.2. The transmitting mode is to transmit the wireless TV/computer/mp3 player to the Bluetooth device.3. The receiving mode is to switch the wireless microphone/speaker into a speaker that supports wireless functions.4. Builtin 300mAh polymer lithium battery, longlasting battery life, can work for about 6 hours.5. Using Bluetooth 5.0 technology, stable signal, low energy consumption, fast and stable connection speed.Specification:Item Type: Bluetooth AdapterMaterial: PVCBluetooth Solution: 5.0 EDR, A2DP, HSP, AVRCPFrequency: 2.4GHz-2.48GHzBluetooth Transmitting Distance: 10m / 32.8ftBluetooth Receiving Distance: 10m / 32.8ftCharging Voltage: DC 5VBuilt-in Polymer Lithium Battery: 300 mAhWorking Time: about 6 hoursBluetooth Receiving Function: connect 1 mobile phoneBluetooth Transmitter Function: connect 1 pair of bluetooth headsetsScreen Display: can display the name of 8 devices to be paired (transmitting) / can display the name of paired mobile phone (receiving).Package List:1 x Host 1 x 3.5mm Audio Cable1 x Charging Cable1 x RCA Cable1 x Manual