Feature: Bluetooth-compatible 5. 3 Version: Bluetooth-compatible 5.3 chip, built-in performance decoding chip, supporting various lossless song playback, "stable" and "fast" transmission, downward compatibility with various Bluetooth-compatible versions, Bluetooth-compatible hands-free function, can help riders control the phone. Universal: 120mm watch band design, skin friendly and environmental friendly, can be directly fixed on the handle of electric vehicles, bicycles, motorcycles and motorcycles, and is very suitable for cycling enthusiasts, delivery clerks and couriers. Long Endurance: Built-in 500mAh rechargeable battery, continuous use time: 800 hours, standby time: 12-18 months, simple operation, one-button wake-up device. Support various lossless song playback; Bluetooth 5.3 chip, built-in performance decoding chip, ultra-long standby, ultra-low power consumption. Strong Compatibility: Applicable to for +Android phones. Answer the phone, increase the volume, decrease the volume, previous song, next song, play/pause, , take photos; Support voice assistant to wake up /Android/ voice assistant on the phone. You can control the device remotely without installing an application, and attach the remote control directly to the steering wheel, just make sure it does not block your dashboard view. Specification: Bluetooth-compatible version: Bluetooth-compatible 5.3 Communication distance: 15m Battery capacity: 500mA Charging time: about 1.5 hours Continuous use time: 800 hours Standby time: 12-18 months Product size: about 165 x 45 x 35mm/6.49 x 1.77 x 1.37inch Band length: about 120 x 30 x 2-3mm/4.72 x 1.18 x 0.07-0.11inch Color: Black Material: ABS Package Contents: 1 x Remote 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.