One of the brightest headlamps by Princeton Tec, the Apex has been a favorite of extreme outdoorsmen and cavers for years. The pinnacle of waterproof (1meter) LED headlamp design, it incorporates a single regulated Maxbright LED plus four regulated Ultrabright LEDs. It is capable of a powerful spot beam or a bright flood, and two switches make changing modes (low beam - high beam - flasher) intuitive. Proprietary heatsink technology allows the LEDs to burn brighter and longer. A small LED (@ 12 o’clock above the Maxbright LED) works as a battery power meter and informs about the remaining burn time. The Apex is compatible with alkaline, lithium and rechargeable batteries.