VRrobot Bluetooth V 4-1 Transmitter and Receiver, Stereo Music 3.5mm HiFi USB Car Adapter

Brand new Color: Black 
Battery: Built-in Rechargeable Li-polymer battery(600mAh) 
Working Time: 8 Hours (depend on audio volume) 
Charging: Mini USB 5V/0.6A 
Audio Port: 3.5mm 

2 in 1 Bluetooth adapter with Bluetooth receive and Bluetooth transmit function Bluetooth transmitter--wirelessly streams audio to Bluetooth speakers or headphones from your TV or older media devices like portable CD players that lack built-in Bluetooth 
Bluetooth receiver--wirelessly streams audio from your phone or tablet to your existing wired home stereo system, speakers, or headphones High Quanlity--Bluetooth 4.2 technology for enhanced audio quality , improved connection stability and faster pairing 
Strong Compatibility--Compatible with Android, IOS phone system and PAD and all Bluetooth audio devices such as TV ,Speaker, PC,CD Player, iPhone, iPod, iPad, Tablets , MP3 Player Or Car Stereo and More B9 is a bluetooth music player, you can easily use notebook computers, mobile phones, PDA, TV, bluetooth headsets and other digital products to the bluetooth device connected to realize the wireless transmission. 
The operation steps: RX switch is for receiving mode, FX is mode for launch, with Micro power supply, insert the 3.5 mm audio equipment, switch to transmit or receive mode, you need open the you want to connect the bluetooth products, search to B9, matching connection success back light has been lit.