Feature:1. Built-in 600mAh battery can ensure up to 8 hours of working time, you can use wireless network for free all day.2. Support noise reduction and cancellation, providing you with excellent stereo sound and excellent sound quality.3. The receiver changes the traditional speaker to a Bluetooth-enabled speaker. When paired, music can be played wirelessly from Bluetooth-enabled smartphones, laptops, tablets and other devices without a cable.4. AUX IN/OUT is supported. Automatic reconnection is supported, easier operation, easier connection.5. Easy to use, no need to download any APP. Built-in battery, long battery life.Specification:Item Type: Audio AdapterMaterial: ABSColor: As Pictures Shown Weight: Approx. 78g/2.8ozBluetooth Version: 5.0Bluetooth Support Protocol: A2DP/AVRCPTransmission Distance: 10m/32.8ftBattery Capacity: 600mAhBattery Type: Lithium BatteryWorking Hours: > 8 HoursCharging Time: About 2 HoursCharging Input Voltage: DC 5VInput/output Connection: 3.5mm Stereo Interface Package List:1 xAudio Adapter 1 x Manual1 x Charging Cable 2 x Connecting Cable