ATTRIBUTES Batteries Included: No Bulb: Cree LED Burn Time: 1/2.6/6.5/35 Hours Carry System: Lanyard Holster Finish: Black Material: T6 Aircraft Grade Aluminum Output (lumens): 180/94/47/9 Overall Length (inches): 3.27 Power Source: 1 x CR123 Special Features: Glass Lens Digitally Regulated Output Spare O-Rings & Rubber Switch Boot Type III Hard Anodized Submersible: Yes to IPX-8 Standards Switch: Tailcap On/Off/SOS/Strobe