Bluetooth version: 5.3 Power display interface: 3.5mm/AUX Battery specification: 250mA/h Charging time: 1 hour Working time: approximately 13 hours Can connect two phones simultaneously Bluetooth 5.3 Audio Receiver & Transmitter Connect in Cars Navigation Report The car audio turns into a Bluetooth audio in seconds, starts with the car, and automatically connects Hands-free Function Built-in microphone, hands-free amplified calls, clear sound quality and no noise Keep your hands on the steering wheel and drive Color: As Shown Material: Metal Border Package Contents: 1 * Bluetooth Receiver Transmitter Host 1 * USB-C Charging Cable 1 * 3.5mm Metal Adapter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.