Featuresr lightweight compact and water resistantr 180 degree beam transmittingr one soft button with 4 modes high low strobe and flash in turnr can be powered by computer power bank or cellphone charging adapter via the usb cabler the light color of the button can indicate battery capacity green light means that battery is under charging and red light means low powerr comes with a quick release silica gel band easy to install and convenient to carryr keep you safe at night and ear