This is a Energizer LED Vision Ultra Rechargeable Headlight with a rechargeable lithium-ion battery This headlight brings a high-quality performance in a compact design. The headlight features a USB port so it can be recharged instead of changing the batteries (cable included) Another feature is the addition of green and red LEDs which enhance night vision which can be used for outdoor activities or night work. For customer peace of mind the headlight also includes a low battery indicator to alert you to replace your batteries. The headlight boasts a lumen output of 400 lumens and is weather resistant and shatterproof. Energizer Part Number: S14672