The lezyne femto drive duo light is an ultra compact two in one helmet light the two in one safety light integrates into a versatile helmet mount evolved from our popular femto series the unit features a front and rear light coupled by a composite matrix junction thatrsquos compatible with nearly all vented style helmets the leds are housed in a super compact lightweight and durable machined aluminum body and the high grade polycarbonate lenses provide side visibility and double as