Powerful 110 Lumen front bike light with continuous array of lads to illuminate a wide and powerful glow ; 1: 30 to 100 hour Run time Exclusive night and day modes provide enhanced safety : high steady, low steady, Steady Pulse, Day Lightning, Zoom, low flash Steady Pulse alerts with pulses as its overlapping steady beam lights the night; day lightning's powerful flashes highlights your presence in daytime Low battery indicator alerts when a charge is needed; USB rechargeable with internal Li-ion battery; water resistant; only 29 grams Cygolite, the trusted American bicycle light experts since 1991 Sport type: Cycling