Item Type: BT Sound AdapterMaterial: ABSBT: V5.0Built in Li Polymer Battery: 400mAhInterface: AUX, RCASupport: USB, Memory Card (Not Included)Charging: 1hPackage List1 x BT Sound Adapter1 x Sound Cable1 x Manual1 x RCA Cable1 x USB Cable1[BT 5.0] This sound adapter is designed with a BT 5.0 chip for greater compatibility and stability. Compact and lightweight design, easy to carry. 2[2 In 1] BT receiver is easy to connect, without any driver and download APP. BT receiver (RX), BT transmitter (TX) two in one, to meet your different needs. 3[LED Digital Display Screen] Wireless sound adapter with LED digital display screen, working status and BT mode clearly visible, more convenient operation. 4[Multi Interface] Sound adapter built in digital to analog chip, support AUX, RCA, USB, Memory Card interface. Support USB (U disk), Memory Card playback and transmit. 5[Long Battery Life] Sound receiver built in 400mAh rechargeable lithium battery, long battery life. Cool breathing light, red and blue dual color, soft and non blinding. 6[HD Microphone] BT receiver adapter built in HD microphone, support wireless listening, hands free calling, navigation. Suitable for phones, tablets, headphones, TVs, etc.