LED: 42Power Supply: 4 AA Battery(not include)Diameter: 14cm/5.5"Thickness: 1.5cm/0.6"Features:1. the back is equipped with hook component， convenient for suspension2. Three levels adjustable light， you can continuously press the switch button to adjust the light.3. LED has extraordinary life time， it can up to 10，0000 hours.4. Can use for outdoor camping. Also can be used as a household emergency light.