•Compact and exquisite appearance. Using Bluetooth-compatible 5.1 chip design,compatibility and stability are stronger •Bluetooth-compatible receiver (RX),Bluetooth-compatible transmitter (TX),and calling three-in-one design •Turn the car audio system into a Bluetooth-compatible speaker in seconds,and you can enjoy mobile music and voice navigation broadcasts •The built-in high-definition microphone supports wireless music listening,hands-free calling,and navigation. Bring shocking sound effects •Cool indicator light,red/blue dual color,transmit/receive mode can be switched at will •Built-in 150mAh rechargeable battery,long battery life •Support TV transmission mode,solve the problem that the TV cannot connect to the Bluetooth-compatible headset •Support 10~15 meters long-distance transmission,independent antenna,enhance Bluetooth-compatible signal •Support win7/8/10 system,no need to drive,plug and play,easy to connect Bluetooth-compatible speakers/headphones •The product connection is simple,without any cumbersome driving and APP downloading,plug and play •Applicable to all kinds of speakers/car/computer/TV/amplifier,etc. Specification: •Bluetooth-compatible version: Bluetooth-compatible V5.1 •Support protocol: RX: A2DP AVRC,TX: A2DP •Working frequency: 2.402GHz -2.480GHz •Interface type: input: 3.5mm interface/output: 3.5mm interface •Product size: 66*20*12MM •Built-in battery: 150mAh •Charging time: about 2 hours •Endurance time: RX is about 8H,TX is about 5H •Bluetooth-compatible distance: 10~15M (open space) •Charging port: DC 5V Package included: •1 x Bluetooth-compatible Adapter •1 x Charging Cable •1 x English and Chinese User Manual