Specification: Power Input: DC 5.0V 350mA Wattage: 1.75 watts LED Count: 22 pcs Luminous Flux: 180 LM Size: Body Size: L 35X D 0.6 inches L 89cm x D 1.5cm Clamp: L 4.4 X W 2.9/1.2 inches L 11.2cm x W 7.5/3cm NET Weight: 0.96 lbs./437g Switch Type: Touch sensitive Max Clamping: 2.6 inches/6.5cm Dim Mode: Seamlessly Touch Dimmable Material: Steel Color: White Amazlab LED Extra Long Necked Desk Lamp comes as a single unit that doesn't need installation. It has: rubber foam padding, between the clamp and two elastic bands behind each "teeth" of the clip to prevent scratching/marking your desk, 22 White LED pieces that are designed to protect your eyes from strain, an extra-long neck with core strengthening technology that guarantees the lamp will be able to hold its position and an extra-long USB ended cord for flexible charging. Often used as: desk lamp, work lamp, drafting lamp, backlighting for drafting boards, display lamp, grill lamp. Couple with a power bank to be used in areas without an available electrical socket. Instructions 1. Clamp it on any available ledge/desk/surface. 2. Plug into any available USB port (laptop/notebook/desktop) to power the lamp OR Attach it to a power bank for portable use. 3. Touch Sensitive switch is located on the tip of the light. To switch it on/off, tap the touch sensitive switch once. To dim/brighten this lamp, hold your finger on it until you get the exact brightness you wish for. For demonstration, please watch our video on YouTube: youtu.be/Js5hw5LOij8 Warning Avoid clamping the lamp on metal surfaces as this may interfere with its circuitry and may prevent it from functioning normally.