[Large Capacity Battery] Up to 15 hours of music/talking time, 14 hours of intercom time, and 120 hours of standby time on a single charge, around 2 hours of full charging time. [IPX67 waterproof and Easy to Operation] IPX67 waterproof design help you handle all weather conditions, you can use the X5 motorcycle communication systems on rainy/snowy/foggy day; Easily button control to play/ pause music, previous/next song, adjust volume, reject or answer calls; press the M button to shift BT/intercom/music share modes (After powering on, short press the M button 2 times to start music sharing, and the other one can wait for a connection). [Two-way Intercom] Motorcycle helmet headset's intercom feature allows 2 riders to share the riding experience and enjoy conversation at an intercom range of 656yds(600meters), in the intercom mode, you can connect Bluetooth to play music (or navigation, calls) at the same time and the music (or navigation, calls) sound will fade in and out when the intercom speakers; but this function is based on you have 2 the same as X5 intercom Bluetooth headsets. [Hi-Fi Stereo and Noise-Cancelling] Premium HiFi stereo speakers for clear, loud enough audio and sound quality on music and phone calls; features advanced CVC+DSP Noise reduction technology and noise-canceling microphone to cut down on background noise for incoming and outgoing audio, ensure that you can still let the other party hear your voice clearly when driving at high speed. [Upgared Helmet Intercom Bluetooth Headset] Bluetooth 5.0 connection, CofunKool X5 allows you to make hands-free calls, enjoy the use of streaming Bluetooth music, listen to GPS voice guidance convenient intercom and Voice-activated digital assistant access, allowing you to enjoy the ride safely and happily.