1,Connecting to 5mm or 2RCA audio interface, speakers without Bluetooth function can also play wirelessly. 2,It supports the connection up to 10 meters or 33 feet, controlling the music playing in a long distance. Support USB playback, plug and play. 3,Support NFC mobile device, touch to connect or disconnect without manual connection. 4,Insert the car USB, connect the AUX cable, and connect the mobile phone to Bluetooth to achieve wireless transmission. 5,Using NFC wireless and chip, using a power isolator with a protective ring, no loss of sound quality. 1 x Receiver1 x Audio Cable1 x USB Charging Cable1 x Instruction Manual1 x RCA Cable Item Type: Bluetooth ReceiverMaterial: ABSColor: As shown in the pictureModel: Ti-800Bluetooth: Bluetooth 5.0Distance: 10m or 33ftPower Supply: DC5VCompatible: All Bluetooth audio devices support A2DP or AVRCP or HFP protocolFunction: Support NFC, support simultaneous connection of 2 speaker devices Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.