Is the TN630 worth it over a thermal monocular?

If you scan for long periods, two eyepieces reduce eye strain and the 640x480 sensor gives a detailed image. A monocular is lighter and cheaper, so choose the binocular only if you value comfort and the built-in rangefinder.

How far can it detect animals?

Guide rates detection at up to 1,950 yd, though real range depends on animal size, weather and terrain. Recognition and identification come at shorter distances than plain detection.

What is the battery life?

The listed specs do not state battery type or runtime. Check the current listing for the power source before relying on it for an all-night hunt.

Does it record photos or video?

The specs list thermal imaging, rangefinder, compass and GPS but no recording feature. Confirm with the seller if image capture matters to you.

It carries an IP66 rating, so it resists heavy rain and dust but is not rated for submersion.

Thermal optics usually see the deepest discounts around fall hunting season and major sales events. Track the price history here rather than buying on the first listing you see.