1、Bluetooth 0 Chip: With the latest Bluetooth 0 chip this adapter can ensure faster and more stable transmission and connection. 2、Smart LED Display: The large LED screen can clearly display the Bluetooth connection status, Bluetooth name, volume, power, caller number, etc. 3、CVC 8.0 Noise Reduction: The built in microphone adopts CVC 8.0 noise reduction function to achieve a clear listening and real transmission. 4、Long Working Hour: It can use music, radio, GPS or phone functions uninterrupted for 10 consecutive hours, and is fully charged within 2 hours. 5、10 M Wireless Transmission: This bluetooth receiver has a receiving distance of up to 10 meters in open space. 6、Hands Free Calls: The hands free function makes it convenient for calls while driving, so you can enjoy wireless music and never miss any calls. 7、Wide Compatibility: Suitable for most Bluetooth devices, so you can just plug in the 5mm audio port to enjoy wireless stereo music. 1 x Audio Adapter1 x Audio Cable1 x Micro USB Cable1 x 3.5mm Connector1 x Manual Item Type: Bluetooth ReceiverMaterial: ABSModel: B31Color: BlackFunction: Through the auxiliary interface, you can upgrade your car or home to Bluetooth compatible audio, listen to music wirelessly, and enjoy free musicScope of application: Most Bluetooth devicesBuilt In Battery: Polymer Lithium BatteryBuilt In Battery Capacity: 250mAhSupport Protocol: A2DP, AVRCP, Etc.Working Frequency: 2.402GHz - 2.480GHz ReceivingSensitivity: -90db To 0.1% BERCharging Time: About 2 HoursUse Time: >10hCompatible Distance: >10m (Open Area)