It can be powered by built-in battery so it's wireless and portable.
Bright light: Update 10 led lamps cast light up to 100 lumens, bright enough yet not too dazzling.
There ways of power supply: AC Charger + USB + Built-in rechargeable Lithium Battery (included)
Two brightness modes: light is adjustable between mode high and half high.
Flexible gooseneck: metal gooseneck is flexible for adjusting the light angle.
Powerful clip: Clip tightly yet avoiding scratching with double side rubber layers. (NOTE: Do not turn on the light while it's charging. Using the light while charging will cause damage to the AC adapter and decrease its life.)