LED Desk Lamp Foldable Duhud Table Lamp Retractable Eye Caring Reading Lights with Usb Charging Port/Battery Operate for Reading,Studying,Working,Bedroom,Office Energy-saving LED bulbs, high efficiency, and long life. It could be repeatedly used for more than 5000 times. USB power cable and battery: two power supply mode lamp,24 SMD LEDs, 2 light tube, 2 power modes for LED light. Eye Caring:Providing natural, non-flickering light for stress free productivity and enjoyment to protect your eye. Foldable &Flexible desk Lamp:Easy to carry and storage for any environment, whether it is at work, in your personal study, or even on the bedside table. 3 AA batteries for battery power mode, the battery is arranged in the bottom of the lamp holder(not included).