HuaYang Bike Bicycle Cycling Waterproof 5 LED Front Flashlight Head Light Lamp w/ Mount Battery: 4 x AAA batteries (not included in the package) Two operation mode: Continuous and Flash, change mode by pressing the button on the top Dimension: 9.5 x 3.0cm (L x D) Material: durable plastic Weight: 50g Applying with the Latest light-focusing technology 5 white super bright LEDs; Waterproof headlight; Over 20m visible range; IC Controlled 2 operating flash types; Quick releasable bracket