Product material: plastic + metal Product color: black, white, blue, green, red Interface type: 3.5mm Featured functions: support connecting earphones, connecting mobile phones, connecting speakers, connecting cars Product size: 5.9*1.5*1.2cm Product bare weight: 12g (Bluetooth receiver + metal adapter) Total product weight: 25g (Bluetooth receiver + metal adapter + cable + manual + PP bag packaging) Working time: 2-3 hours Product packaging: sealed PP bag Product features: Bluetooth receiver, car Bluetooth receiver, car Bluetooth receiver, AUX Bluetooth receiver, audio adapter Product List: 1×Bluetooth receiver 1×3.5mm metal adapter 1×USB charging cable 1×Chinese and English manual