Koparneed magnifier is rechargeable charging by USB cable included in set. The hand loupe features a built-in 3.7V 800mAh battery that offers up to 9 hours of auxiliary light usage on a full charge Features 10X magnification with dual 30mm optical glass lenses delivering a bright and clear view to inspect fine details in jewelry, coins, and electronics This Handheld magnifying glass has 8 high-power LEDs (4 UV lights + 4 white LED lights), short-press the front button to cycle white/UV/off; long-press to adjust white light brightness. Perfect for examining fine details in jewelry, antiques, textiles, and more This coin magnifying glass also features tricolor strong light sources (White, Yellow and ) allowing for crystal-clear, versatile viewing. To have this item is like having a handheld magnifying glass and a jewelry flashlight