The ReachIR is a portable force multiplier.  The use and potential for a small handheld thermal like this is huge.  It doesn't look aggressive and can be carried into almost any situation without causing alarm/concern.  Thermal optics give you more situational awareness in both day and night cycles.   

There are lower power options but here with the 35-640 -- the clarity and power with 8x digital zoom is a great way to spot and detect before you are.

• 640×512, 12-micron sensor
• Sub-20mK thermal sensitivity
• Fast 50 Hz imaging
• Built-in 1,000-meter laser rangefinder
• New optimized image processing algorithms
• 1x, 2x, 4x, 8x digital zoom
• 1024×768 resolution, 0.39-inch OLED display
• Vide/audio recording and image capture
• 64 GB built-in memory
• Wi-Fi hotspot
• Standby mode
• Replaceable and rechargeable 18650 Lithium battery
• Up to 4.5 hours continuous running
• Auto screen-off function
• Robust magnesium alloy housing
• Waterproof
• 5-Year Warranty