1、In transmitter mode or receiver mode, it can be paired with 2 Bluetooth devices or speakers at the same time. 2、After a charge, the Bluetooth 2-in-1 transmitter receiver can be used continuously for about 26 hours at most, and it can be used while charging. 3、In the high range of up to 10m, the signal transmission is not restricted. 4、Built‑in optical fiber and 5mm interface, can be used as Bluetooth adapter, which is fit for TOSLINK and 5mm BT converter. 5、Suitable for Android, for IOS system mobile phones and all Bluetooth audio devices. 1 x Host1 x Manual1 x Charging Cable1 x Audio Line1 x Adapter Cable1 x Fiber Optic Cable Item Type: Bluetooth Receiver TransmitterMaterial: ABSBluetooth Chip: CSR8675Bluetooth Version: Bluetooth V 5.0Built-in Lithium Battery: 600MAH (battery included)Working Time: about 26HAudio Performance: for APTX/APTX LL//APTX HD/AAC/SBCBluetooth Distance: Approx. 10m / 32.8ftCharging Method: Micro USB 5V/ 0.5ACharging Current: 200-300MAInput and Output Connection Mode: 3.5MM stereo interface, optical interfaceSuitable: for Android, for IOS system mobile phones and all bluetooth audio devicesHow to Use:Connect via bluetooth Pairing 1. First connect the power cord to the power supply, and then connect to the product. After power on, the bluetooth audio receiver successfully enters the pairing state. 2. Turn on the bluetooth function of the mobile phone or other device, search for the device, and click Connect after the search is successful. 3. After the connection is successful, the next time you use it, you only need to press the power button for 3 seconds to turn on the phone and it will automatically connect to the mobile phone or other equipment you used last time.