The NightRider Epro EV brings NiteRider quality to Electric Bikes integrating with the ebike battery. The NightRider Emax+ 150 EV taillight brings NiteRider quality to Electric Bikes integrating with the ebike battery. Compatible with 6 to 80 Volts DC the Emax+ powers on with the bike and offers 6 modes.Headlamp powers ON with ignition switch2 Modes Steady ON and Pulse Flash with Built-in Mode Memory (remembers last setting)Headlight Voltage 12 to 40 volts 1.2 amps at 12v 300mA at 40 voltsSecure on/off-road handlebar mount fits 22 to 31.8mmTaillight powers ON with ignition switch2 Steady and 4 Safety Flash Modes w/ Built-in Mode Memory (remembers last setting)Taillight Voltage 6 to 80 Volts DC