I'm selling these because I received a lot of them from my friend's motorcycle shop. ★ This motorcycle intercom uses a newly upgraded wireless V5.3 chip and can connect to two mobile phones simultaneously. You can freely switch between listening to music, navigating, and answering calls without any problems. ★ The motorcycle intercom is equipped with a 1000mAh battery and supports TYPE-C fast charging. Charge when the light turns red; a 20-minute charge provides 3.5 hours of use, with 50 hours of continuous playback and 18 months of standby time. The helmet speakers are treated with advanced waterproof technology, offering IPX6 water resistance.