1. Light source uses CREE LEDs with high efficiency & long lifetime 2. Aviation grade aluminum alloy casing, shock & impact resistant. 3. Battery with protection against over charge, over discharge and short circuit. 4. It will be flashed when the battery is low, then automatically disables self-protection. 5. Waterproof IP66, corrosion proof WF2. 6. Portable, suspended, or waisted