Stable Connection: Featuring a Bluetooth 5.1 chip, this device offers a faster and more stable connection without worrying about interruptions or pairing issues. RX Mode: The Bluetooth receiver can easily upgrade your power amplifier and car stereo into a Bluetooth-enabled device for wireless Bluetooth operation from your mobile phone. TX Mode: The Bluetooth transmitter upgrades your TV, computer, or projector into Bluetooth-enabled devices, allowing for remote control and easy connection. 3.5mm AUX RCA Interface: Equipped with a 3.5mm interface, our Bluetooth receiver and transmitter supports various devices. The AUX RCA interfaces offer easy connection to many devices. Plug and Play: Simply connect the Bluetooth receiver and transmitter and start using it immediately without the need for driver installation or additional apps. Item Type: Bluetooth Receiver Material: ABS Bluetooth Version: 5.1 Supported Protocols: RX: A2DP, AVRCP, HFP , TX: A2DP Operating Time: RX > 12H, TX > 8H Battery Information: Li Ion Battery 250mAh (Built-in battery) Charging Time: About 2h Package Includes: 1 x Bluetooth Receiver, 1 x Charging Cable, 1 x Stereo Cable, 1 x RCA Cable, 1 x Instruction Manual