This ultra-compact, professional LED tape measure is the industry's first! The built in LED light is strong enough to light up any dark environment, ensuring an accurate measurement. Nylon Coated Steel Blade Ultra-compact case Built in LED light Quick rechargeable USB The LED has an auto shutoff after five minutes, in the event it accidentally gets turned on. It also comes equipped with a USB cable for lightning fast battery charges. A full charge will allow for three hours of continuous runtime.