Item Type: Bluetooth 5.0 Audio ReceiverMaterial: ABSColor: BlackBluetooth Version: 5.0Interface: 3.5mmConnection Range: Appprox. 10m/32.8ftStandby Time: About 72hUse Time: About 24hBattery Type: Lithium BatteryBattery Capacity: 300mAh (including)Package List1 x Receiver1 x Back Clip1 x Audio Adapter1 x Audio Line 1 x Description1Using bluetooth 5.0 version, strong signal, sensitive transmission, stable connection, Just pair it with your phone and start listening to your favorite music 2Bluetooth audio receiver uses the latest noise reduction technology to eliminate echoes and disturbing background noise. 3High quality ABS material, durable and shiny. Lapel design, easy to carry, builtin 300mAh battery, 72 hours of ultra long standby. 4Builtin battery, hands free call feature, you don't have to look down at the phone while moving. Make sure you drive safely 5The portable bluetooth stereo adapter will pair automatically, and the car receiver will automatically reconnect to your paired bluetooth devices as long as they're in the 10m range.