The USB rechargeable Pocket Mate is small in size but big on power - producing 325 lumens. Ultra-compact design makes it easy to always carry it with you. No need to juggle your belongings, simply attach it to a zipper or keep it handy on your key ring. Drop it in your pocket or clip it to your visor for hands-free use. No Standalone lithium batteries are sold with the product Bright white LED with high and low mode: High: 325 lumens; 76m beam; runs 20 minutes Low: 45 lumens; 28m beam; runs 1 hour Spring-loaded clip with carabiner shape hangs cleanly on key rings, zippers, lanyards, etc Conveniently charges via USB power source, Lithium polymer battery charges in 4 hours Multi-function push-button switch with charger indicator LED: Red = charging; Green = charged