Car Visor Bluetooth Hands Free 1 To 2 Large Volume Car Phone Speaker 1. Charging time: about 2h 2. Usage time: about 30h 3. Battery capacity: 1000mAh 4. Bluetooth version: 5.4 5. Bluetooth receiving distance: 10m 6. FM transmitting distance: 10m 7. Speaker: 4 ohm 3 watt 8. Material: ABS 9. Weight: about 83g 10. Size: about 12.3 x 5 x 2cm Features: 1. Built-in 4 ohm 3 watt high-quality subwoofer HD speaker, Chinese and English voice prompts 2. Multi-function digital display, display frequency, power, volume, number of songs in TF card 3. FM transmitting function, car radioand other radios can receive the signal transmitted by this machine 4. Card reader transmission, connect the computer with a transmission line to read the card and transfer files 5. Connect the computer with a transmission line and use it as a computer speaker 6. Bluetooth multi-point connection technology, one to two, can connect two mobile phones at the same time, support all audio playback of mobile phones 7. Supports TF card to play music, and can play music without connecting to a mobile phone 8. Type-C charging port, supports charging, computer connection, audio input, and file transfer 9. Bluetooth version 5.4, lower power consumption, faster transmission 10. Built-in 1000mAh battery, continuous music playbackcalls for about 30h, voice prompt when low battery, can be used while charging