Look good from behind. The Blinder ROAD R70 is the rear light for the discerning rider. With side illumination, dual constant flash modes, and crazy power, you won't find another light with as much brains and beauty. Coming with interchageable straps suited to aero post designs outputting 70 lumens of light, the Blinder ROAD R70 has got your back, whatever your ride. RUN TIMES 3.5 hours in Steady mode, 4 hours in Fast, 5 hours in Chaser, 13 hours in Peloton Mode and 20 hours in Eco-Flash BIKE ATTACHMENT Tool-less attachment for standard rear posts measuring 22-32mm . Suitable for aero post designs. LIGHT OUTPUT 70 lumens DIMENSIONS 27 x 76 x 52mm. WEIGHT 52g LIGHT MODES 5 light modes 1.Steady, 2.Fast, 3.Chaser, 4.Peleton, 5. Eco-Flash. RUN TIMES 3.5 hours in Steady mode, 4 hours in Fast, 5 hours in Chaser,