ireless headset for bluetooth enable cell phone at a range of up to 10 metres. Bike-to-bike intercom for rider&passenger or two separate bikes up to 200-800metres. Up to 10 hours talk time when connected to cell phone. Up to 5 hours talk time when using the intercom feature. Up to 300 hours standby. Flip-up chin bar and face shield: Single-button release allows chin bar/face shield to be opened with one hand. Central locking mechanism can easily be operated with either hand. Retractable double visor Multi-ratcheting face shield. Two adjustable chin-bar vents and adjustable forehead super intake vents. Removable and washable liner and cheek pads.