Sena 50S-10 Single Kit Comes with everything you need to install in your helmet Features Bluetooth 5.0 technology and Features a versatile Jog Dial for effortless operation HARMAN-KARDON version of the 50S HD speakers are slimmer and trimmed around the edges for a comfortable fit with a helmet on; audio output delivers crystal-clear sound quality Features multi-language support and direct digital assistance; can be used with Google Assistant and Siri through voice commands Charging time of 1 hour or a quick 20 minutes for 3.5 hours of communication or 6 hours of Bluetooth intercom Connects to Senas 50 Utility App for customization of a variety of settings