Item Type: BT Transmitter Receiver Material: ABS Battery: Li Ion Battery 402030 (Built in), Capacity: 300mAh BT Version: BT5.0, EDR Operating Time: 8 to 12 Hours Frequency Response: 20hz-20khz Rate Input: DC5V 500ma Sensitivity: 1003db RX Mode: Easy Pairing with BT Enabled Smartphones, Tablets, Desktops and Laptops TX Mode: Easy Pairing with BT Headphones, Earbuds, Speakers, and Other BT Enabled Sound Systems1TX Mode: Bluetooth transmitter plugs into a non Bluetooth device such as a TV, PC, MP3 player or electronic book reader via the AUX, RCA jack to transmit sound to a Bluetooth headset, speaker or receiver. 2RX Mode: 2 in 1 Bluetooth transmitter receiver, in RX mode, the Bluetooth receiver can connect to wired speakers, headphones, and receive sound from smartphones via Bluetooth. 3TX Mode Application: BT adapter wirelessly transmits stereo sound from your non Bluetooth sound source to Bluetooth enabled devices via TX mode, allowing you to enjoy premium music wirelessly without disturbing others. 4RX Mode Application: The Bluetooth AUX adapter allows you to enjoy CD like sound quality wirelessly on your home stereo or wired speakers by turning your old wired headphones or speakers into Bluetooth headphones or speakers. 5Long Battery Life: This Bluetooth transmitter receiver charges via USB cable and supports charging while working, with built in battery that supports the adapter for 8 to 12 hours of operation per full charge.Bluetooth adapter without volume control buttons.1 x BT Transmitter Receiver 1 x RCA Cable 1 x 3.5mm Sound Cable 1 x USB Cable 1 x Instruction Manual