The ThermoSight R-Series is the ideal scope for hunting at night because it detects heat energy, instead of light. The body heat of target animals glows bright through the R-Series scope - while you remain hidden in the dark. Conventional image intensified (I2) night vision scopes are more limited because they require illumination from moonlight or other sources, and they can't reveal what's hiding in shadows or in low-contrast environments the way thermal can. The scope contains the most advanced image correction technology available, and optimizes images automatically. The R-Series provides three inches of eye relief, up to 5x digital zoom, and multiple reticle options (Duplex, Fine Duplex, German) with a repeatable and dependable zero. This model offers six different detection palettes (Black/White/Sepia/Iron/Red/InstAlert). FLIR's exclusive InstAlert displays the hottest temperatures in red so you can detect animals, people and other warm objects more easily. With large, glove-friendly buttons and an intuitive menu, you can quickly set reticle settings, zoom, and polarity palettes in three clicks or less. An internal shock reduction system (SRS-M) is qualified for a MSR semi-automatic platform, up to .30 Cal, and the durable, water-resistant casing can be submerged in up to three feet of water. The rechargeable battery provides up to 4 hours of use.