Generic KX-621 Cree XR-E Q5 250LM 3-Mode Neutral White Light Zooming LED Headlamp w/ 5 Rear Red LED (1 x 18650) Material: Aluminum Alloy Color: Neutral White Number of Emitters: 1 Battery Configuration: 1 x 18650 (not included) Voltage Input: 3.7~4.5V Circuitry: 900~1100mA