The Seac Sub R3 FX underwater flashlight made primarily for apnea activities (free diving) compactness and light weight and power, make it versatile and usable in underwater environments with low visibility or in tropical seas. Its battery life is 2 hours at maximum power, but can go up to 8 hours when used at reduced power.Its weight of only 255 g and its dimensions, length 140 mm and diameter 42 mm, make it unobtrusive and handy, perfect for traveling, it can be clipped to wetsuit rings , be kept in a pocket or worn on the wrist with the included lanyard. Thanks to its 5-watt LED, it can generate a luminous flux of up to 400 lumens. The neutral white color light (7000 K) similar to sunlight returns the colors of the underwater environment. The internal Li-Ion 18650 battery, is easily rechargeable by external battery charger with Micro-USB provided. Two innovative features have been introduced to prevent flooding, the electromagnetic magnetic pulse power switch contained in a compartment separate from the case and a 3-point radial seal that replaces traditional o-rings. Seac Sub once again wanted to produce a high-quality, ergonomic, aluminum alloy, impact and pressure-resistant tempered optical glass Italian design product. Maximum operating depth 100 MT