... LEDs,great for house,travel,camping emergency use Item Name:hand crank dynamo camping light Description :4pcs high-luminance ... lowest power Input .Great for power outages, emergencies, camping, hunting, fishing and more. Parameters: ABS body, ... handle in 1 minute, get you 30 minutes light for 4pcs LEDs .If you have any questions ... 24-48 hours Rotary led dynamo camping light/dynamo camping led lantern