High tech, ultra-bright LED, operation life up to 100,000 hours, never need replacement. Water resistant, shockproof, and erode prevent design, be your great assistant to cope with bad outdoors environment. Luminescence ultra-bright LED, no flicker and lowest power-consumption. High intensity 5 LED bicycle head light and 5 LED taillight. Multi-function, guiding your way in the dark. 5 red LED, wide beam. IC control 7 function mode. Quick release bracket, portable attach to your bicycle. Burn time: up to 150 hours. Visibility: 2500 feet. Material: plastic. Battery: two AAA batteries. (not included)