Lezyne Femto Drive Duo

The Femto Duo is a two-in-one safety light integrated 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 that’s
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
the power button. The front emits 15 lumens, while the rear puts out 7
lumens; both feature three different output modes. With easy to replace
CR2032 batteries, the Femto Duo is a simple front and rear lighting
system for increased nighttime visibility.

MAX LUMENS: 15
BATTERY: CR2032 (4 included)