* Direct rechargeble; * Tailcap rubber switch; *The flashlight Water-proof & shock-proof; *ADD CMOS chip Regulated Circuit (constant electricity, isobarical, prevent excessive voltage) for protect LEDs well-balanced lighting ; *Type III Hard Anodization for Extreme Corrosion and Wear Resistance (option); *Precision Machined Aircraft Grade Crush Resistant Aluminum *Low Heat - Energy Efficient Durable Diodes (LED only)