◆. Dynamo and Solar-energy for power generation ◆.3 super bright LED lights brightness up to 30,000mcd ◆.it can be rechargeable Lithium-ion battery,3.6V-40mAH,the batteries can be rechargeable more than 800times ◆.handle for 1 minute,output power≥0.4W,3 LED can be lighting for 5-8minute,solar-energy. ◆.Light weight size convenient to carry ◆.Size:9*5*3.4cm ◆. Weight:85 g