The HL-EL160 with a waterproof construction is a great companion for your commute or leisure ride. Long runtime3x brighter than EL135OptiCube™ lens technologyWaterproof IPX7: Operates even after 30 minutes of submersion in a depth of 1 meterLow battery indicatorAA alkaline battery x 22 light modesMode memory functionFlexTight™ H-34N bracket