LEDwholesalers Touch-Sensitive 3-Level Dimmable Flexible Neck LED Desk Lamp 6 Watt with Detachable Head Detachable head design enables head unit to serve as standalone portable light. Touch-sensitive on/off and dimming control. Power via USB port from laptop or computer. Anti-glare, non-flickering, non-flashing LED light source. Long life ~ 30,000 hours, 1 year warranty.