The Diablo SYNC Pack gives you the widespread, high powered beam of a Diablo with SYNC Bluetooth connectivity and an external battery pack for greater run times.Includes 3.4A Support Cell, Helmet & HB mount & SYNC BlueTooth Remote 1850 LumensSYNC allows custom programs and controlling both helmet and handlebar lights can be simultaneously with a single remote Optimised Mode Selector allows rider to fine tune power and run times for the rideIntelligent Thermal Management prevents overheating and maximizing battery lifeSmart Port+ enables the charge port to accept auxiliary accessories such as rear lights, remote switches, Support Cells and to use your light as a power bank to charge USB devices