With the Flash Headlight/Taillight Combo, you’re equipped with everything you need to be seen. It features up to 70 lumens in the front and 20 lumens in the rear, and it features the versatility of four light modes, ranging from steady and strong to flashing and brilliant. Increase your visibility with the Flash Headlight/Taillight Combo.Flexible mounting system works with handlebar and seatposts from 22.2mm up to 35mm in diameter, as well as most seatstays, helmets, and saddle bags.O-ring mount (extra o-ring included) fits all round seatposts and handlebars.Built-in fabric belt clip makes it a clip-anywhere option.2x 200mAh batteries recharge via included micro USB cable in 2:00 hours.IPX7 waterproof means this light will be there when you need it, even in the hardest rain.Tested and approved for the following Specialized helmet models: Align, Ambush Comp, Chamonix, Propero II, Echelon IIRed Steady mode: 10 lumens for 2:00 hoursRed Power Flash mode: 20 lumens for 4:00 hoursRed Disco Flash mode: 14 lumens for 6:00 hoursRed Eco Flash mode: 5 lumens for 20:00 hours