The Energizer Vision Ultra HD Rechargeable Headlamp brings outstanding performance in a compact design. The headlamp shows innovative features with its rechargeability (USB port) and the Energizer Smart Dimming technology which allows for easy control of light intensity. In addition to the white LEDs, this light has green and red LEDs which preserve night vision for outdoors activities such as hunting and shing. The VisionGuard technology gradually increases the light intensity to prevent a high beam straight in the users eyes.