Operation life up to 100, 000 hours, never need replace Water resistant, shockproof, and erode prevent design, Perfect for you used under the bad outdoors environment luminescence ultra-bright LED, soft, no flicker and lowest power-consumption Multi-function, guiding your way in the darkness Quick release bracket, portable attach to your bicycle 5 LED head light features: 5 LED bulbs, bright LED white light, water resistant 2 different operation models: flashing and steady Multifunction: bicycle light, torch, diving, etc. Quick release bracket, easy to install Power: 4 x AAA batteries (not included) Size: 10cm x 3.3 cm 5 LED taillight features: 5 red LED, wide beam IC control 7 function mode Burn time: up to 150 hours Visibility: 2500 feet Material: plastic Powered by 2 x AAA batteries (not included) Dimension (lamp): 66mm x 35mm x 27mm