Asp Law Enforcement Sapphire USB Rechargeable Wearable Lights with Green Aluminum Panels Rechargeable, using included adapter or any micro USB charging cord 20 lumens, 1 hour run time Weighs just 1.5 ounces The best materials, components and constructionfrom a brand trusted by police and military professionals around the world for over 40 years. Available in a variety of colors Brilliant white 20 lumen light engine Charged via the USB port of any computer or on any micro USB compliant cell phone charger Edge mounted two-position switch provides intermittent or constant-on activation Clip is built into frame for easy attachment/carry