Farraige® Bluetooth 4.1 Transmitter Receiver Portable 2-in-1 Wireless Audio Adapter 3.5mm Stereo Output for Headphones, TV, Computer/PC, MP3 / MP4 Player, Car Stereos Farraige Bluetooth 4.1 Transmitter Receiver Portable 2-in-1 Wireless Audio Adapter 3.5mm Stereo Output for Headphones, TV, Computer / PC, MP3 / MP4 Player, Car Stereos Kindly Note:  This product is built-in rechargeable battery for long standby and use.Recommended charge full power before first use. If any problems met when using,pls feel free to contact our customer service for help.  Receiver Mode: Used for all audio interface speaker device.  B6 Bluetooth Receiver change the traditional speakers into Bluetooth-enabled ones. After paired, play music wirelessly from your Bluetooth-enabled Smart Phones, Laptop, Tablet and more without the hassle of cables. Support Automatic Re-connection.  Transmitter Mode: wirelessly connect to media players, e-readers and more.  B6 Bluetooth Transmitter is specially designed for the Audio Devices (such as MP3, MP4, TV and PC, etc.) without Bluetooth function. You can connect the Bluetooth Transmitter to the audio devices via the included 3.5mm Audio Plug, changing these audio devices into Bluetooth-enabled audio devices, and making it work with Bluetooth-enabled Headset and Speaker.  Specifications:  Bluetooth Version: V4.1 Frequency Range: 2480MHZ  Support Bluetooth Profile: A2DP, AVRCP, HFP, SPP HID Bluetooth Range: Up to 33 feet(10M)  Battery: Built-in Rechargeable Li-polymer battery(600mAh)  Working time: Up to 8 hours Charging time: about 2H Charging input voltage: DC 5V Input/Output connecting mode: 3.5MM stereo audio port Compatibility: Compatible with phones and PAD of Android / IOS system,and all the bluetooth audio devices.  Package Includes:  1 x Farraige 2-In-1 Bluetooth Receiver and Transmitter 1 x AV Cable 1 x 3.5mm Audio Cable 1 x USB Charging Cable 1 x User Manual