This light kit are good enough to ensure absolute safety at night. It is always worthwhile.High beam - durable, safe and reliable. You won't feel visual fatigue after a long ride.You can see the super bright lights above 200 meters, so you can ride more safely.Top material - Made of durable aluminum and ABS plastic.BIKE BICYCLE 5 LED POWER BEAMProduct Description:Features: Headlight Specification: 5 LED ultra bright white light water resistant 2 modes: steady and flash, switch between 2 modes by pressing the button on the top of the light Quick release bracket, very easy to instal Suitable for handlebar tube diameter less than 29MM Specification: Material: plastic Front light: 5LED Tail light:5 LED Front Light Weight: about 47g Tail light weight: 29g / 1oz Battery fo front Light:4pcs AAA batteries(not included) Battery for tail light:2pcs AAA batteries(not included) Package List: 1 x Bike Head Light 1 x Tail light