1) Aluminum alloy casing2) Aluminum alloy reflector3) CREE P4 LED, up to 100 Lumen4) 1 x 3.0V "CR123A" battery5) 2 x 1.5V "AA" size alkaline batteries6) Burn Time: 6 hours ("CR123A") / 7 hours ("AA")7) Shock proof and water proof8) Tail push switch on/off9) A wrist lanyard attached