Utilising COB (chip-on-board) technology and alloy body the Ultratorch R50 is a great choice for both urban and rural environments.Key Features• Max Output 50Lm• Runtime 2-16hrs• 16 diode COB LED • 270 degree visibility• Low battery indicator• USB rechargeable 3.7v 500mAh Li-Pol battery• Waterproof IPX7• Tool-free universal seat-post bracket and micro-USB cable includedSize (approx): 25mm x 25mm x 70mmMode & RuntimePower-on: 2hrsHigh Constant: 4hrsMedium Constant: 8hrsLow Constant: 16hrsFlash: 16hrs""