The Table Lamp Has Switch. Short The Touch Switch To Adjust The Light Brightness In Three Levels (Low Light, Medium Light, Strong Light), And Long The Touch Switch To Adjust The Color Temperature In Three Levels (Warm White Light, White Light, Warm Light). Applicable To Different Scene Lighting. The Desk Lamp Has 26 -Saving, High-Brightness, Long-Life 2835 Smd Led Lamp Beads. When The Micro-Usb Input Is Charging, It Can Work While Charging. The Potassium Battery Has An Overvoltage Protection Function When Charging. When The Battery Voltage Reaches 4.2v, It Automatically Protect. The Product Is Powered By 18650 Battery. The Product Has A Low-Voltage Protection Function. When The Battery Voltage Is Lower Than 2.8v, It Enter The Low-Voltage Protection, Turn Off The Output, And Need To Be Recharged Before It Can Be Used. The Product Has Over-Voltage, Over-Temperature, Over-Current, Polarity, Short-Circuit Protection, And Charging Status Indication Functions When Charging (The Red Light Is On When Charging, And The Red Light Is Off When The Carp Battery In The Product Is Fully ). The Product Is Equipped With A Micro-Usb Input Charging Port, Charging Voltage: Dc: 5v, Current: 1A, And The Product Is Fully For About 3.5 Hours