... hard oxidation treatmentVoltage: 3.0-4.2V (Please use it in this voltage range)Luminous Flux: 240 lumensLamp Life: ≥ 100, ... , resistant to high temperature, high humidityPerformance, you can use in a variety of harsh environmental conditions.Other: flexibility, the outer ... of the depth of non-slip handle, light and beautiful, in the pocket carry, and easy to operateDouble protection: the circuit inside ...