1: Can be operated with USB plug, easy to study and work 2:Bright light and low power consumption 3: Easy to take, exquisite and unique design, excellent gift 4:CS11-CS15, USB ball light series 5: Watt: 0.8W-0.9W 6: Brightness: 2000-4000MCD 7:Can be with 5pcs, 6pcs and 10pcs LED, lamp shape is shell when LED is 6pcs and 10pcs, rectangle when LED is 5pcs