AUX Bluetooth receiver transmitter: wireless life is more exciting, without loss of sound quality all the way to listen Bluetooth transmission mode (TX): Convert wired audio into Bluetooth signal, and transmit it to Bluetooth device for output Bluetooth Receive Mode (RX): Receive Bluetooth signal and transmit it to wired audio through Bluetooth connection Turn into a Bluetooth TV: Connect to the TV's 3.5mm audio interface, and transmit the sound to the headset via Bluetooth, so you are not afraid to disturb your family when watching late night movies. PS: Use in TX mode (TX) Turn into a Bluetooth speaker: Connect to a 3.5mm audio port, and the speaker without Bluetooth function can also be played wirelessly. PS: Use in transmit mode (TX) Fully charged once and used for 4 hours: built-in rechargeable lithium battery, charged once, can be used for 4 hours continuously when the battery is low, convenient and worry-free Enjoy freedom 10m transmission: 10m long-distance transmission is continuously connected, and you can listen to the freedom in the corner Product name: Bluetooth audio receiving and transmitting combo Battery capacity: 140Amh Bluetooth version: V5.0 Life time: Greater than 4H Bluetooth distance: less than or equal to 10M (open place) Charging method: Micro-USB 5V/0.5A Output connection mode: 3.5MM interface Input connection mode: 3.5MM interface for: Android, IOS system mobile phone and PAD, and all Bluetooth audio equipment, audio equipment with audio input interface colour: black Material: ABS size: 59.5x22x12mm Package Contents: 2 x Bluetooth receiver transmitter 2 x charging cable 2 x 3.5mm audio head