[Brightness Adjustment] dial power switch has variable fluid adjustment from 0-700 lumens of light output. So this work light can meet your numerous lighting needs. [USB Rechargeable] Equipped with Built-in battery with universal USB charging cable for easy charge and daily use. [Energy Efficient] It lasts 13 hour work time at 50% power, 3.5 at full power.The length of work time of the work light is related to the brightness of the light. [Magnetic Base and Swivel hook] Swivel hook & magnet base makes your hands free, and the body of the work light can be adjustable to provide multi-angle illumination. [Wide Application] COB LED work light is the most handy tool for home emergency lighting, car repair, camping, hiking and so on, one light to meet all your demands. Switch:stepless dimmer switch Bulb:1 x COB light strip Power supply:Built-in battery 18650 battery 1800mAh Product weight:175g Quantity of lamps:4Pcs Colour:Black Material:Plastic Size:37.5x3.5cm Package Contents: 4 * led work light 4 * usb cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.