How far can the TS004 actually see?

TOPDON rates detection at up to 450 yards and recognition at about 100 yards. Detection means spotting a heat blob; recognition means telling what it is, and that happens much closer.

Is 256x192 resolution enough?

It is fine for spotting animals, people and trail features at close to mid range. If you need to identify small details at long distance, a 384x288 or 640x480 sensor shows more.

Can I use it in rain and mud?

Yes. The housing is rated IP67, so it is sealed against dust and survives being dunked briefly. That suits wet trails and rough field work.

How long does the battery last?

TOPDON claims over 11 hours per charge, which covers a full night of intermittent scanning. Continuous use and cold weather will shorten that.

Does it record photos or video?

The listed features cover live thermal viewing only, with no onboard capture mentioned. Plan on a separate recorder if you need evidence or footage.

Shoppers who want daytime optics, long-range identification or recorded footage will do better with a higher-resolution model or a thermal scope with capture.