Single switch adopted = simple operation stress ZERO specification.Wide irradiation with a wide irradiation surface.Can be used for a long time.Recommended for a wide range of people!Brightness about 160 lumens (in High mode).About 20 lumens (in LOW mode).Light source used : High-performance LED chip White x 3.Battery used AAA alkaline batteries x 3 (sold separately).ZEXUS dedicated battery ZR-01 (sold separately).Lighting time HIGH mode: About 10.5 hours ; LOW mode: about 70 hours.Viewing distance about 40m.Waterproof performance equivalent to IPX4