Happy Hour - Portable 12W USB LED Light for Outdoors Travel Camping Fishing Hiking and Emergency Powered / Durable Lightweight Reading Bulb with Switch and Storage Function(Cool White) 100% newly design with electricity storage fuctions, full charged with 2 hours under rated voltage could use over 4-5 hours, also could be used by connect other USB source; Mini and outer shell with heat dissipation design is geart to protect the LED bulb light; A soft plastic hook for hang on or take down anytime and a cure switch on the outer shell is convenient for you to take on/off; 180 degree beam angle provides wide ambient lighting, which is suitable for your eyes and also environmentally friendly; Powered by any USB source, such as power bank, computer, or with the cellphone charger adapter and so on;