LMJ-CN&reg; have 4pcs small led Lamp beads for IR spare bulb, 850nm IR NVG Infrared LED for Ultrafire Surefire 501B 502B and Hugsby Flashlight Torch Etc. Use with Night Vision Goggle, Night Vision Camera, Digital Camera with 0Lux.... That IR bulbs have four small led lamp beads, longer life, better quality. Powered by: 2 x 16340(CR123A) 3.6Vor 1x18650 3.7v Size:Height,29.7mm; Diameter,26.5mm Peak Wave Length : 850nm; Operating voltage: 3.7V - 9V