Features . Run time on head light 4 7 hours depending on mode. Includes 1 flat CR2032 battery each. USB Rechargeable Bike Headlight 2 Tail LED Bicycle Light Set Specifications . Material Plastic 300 lumens. Battery 3 7V 1200mAh. Headlight 4 x 1 25 x 3 25 . Weight 0 44 lbs