The appearance of the product is exquisite.Using Bluetooth 5.1 chip design, compatibility and stability are stronger.The three-in-one design of Bluetooth receiving (RX), Bluetooth transmitting (TX) and calling.Equipped with AUX in-car Bluetooth speaker, you can enjoy mobile music and voice navigation broadcast.Built-in high-definition microphone, support wireless listening to songs, hands-free calling, and navigation.Upgrade wired to wireless in seconds, connect to ordinary speakers, and shock sound.Cool indicator light, red/blue two colors, the transmit/receive mode can be switched at will.Built-in 150mAh rechargeable battery, long battery life.Support TV launch mode to solve the problem that the TV cannot connect to the Bluetooth headset.Support 10~15 meters long-distance transmission, independent antenna, enhance Bluetooth signal.Applicable to win7/8/10 system, no driver required, plug and play, easy to connect to bluetooth speakers/headphones.The product connection is simple, without any cumbersome driving and downloading APP, plug and play.Bluetooth version Bluetooth V5.1Supported protocols RX: A2DP AVRC TX: A2DPWorking frequency band 2.402GHz -2.480GHzInterface Type: Input: 3.5mm Interface / Output: 3.5mm InterfaceProduct size 66*20*12MM (2.59*0.78*0.47 inches)color:blackBuilt-in battery 150mAhCharging time about 2 hoursBattery life RX about 8H, TX about 5HBluetooth distance 10~15M (open space)Charging method Type-c DV5VApplicable scenarios Various speaker/car/computer/TV/amplifier and other scenariosPackage includes: 1*Bluetooth receiver