Providing super bright neutral white light underwater. Comes with 2 3000mAh 18650 batteries, max running time reaches 1.5hours on high, 3 hours on medium and 5.5hours on low setting.MAGNET ROTARY SWITCH – The diving flashlight adopted magnet rotary switch, more safe and reliable for underwater lighting. Insert two batteries and tighten the light to turn on and unscrew the light head to turn off. Note: Please take off the insulation sheet(between the battery and light) before use.SOLID CONSTRUCTION – Diving flashlight body is made of military-grade aviation aluminum AL-6061-T6. Abrasion and seawater corrosion resistance. The double-barrel body offers overheating protection and avoids external electrification.100M UNDERWATER WATERPROOF – Special sealing design and three O-rings ensure excellent resistance in high water pressure. This underwater flashlight can be used in maximum 100 meters underwater. Maximum lighting distance up to 236 meters.