....just bought one for my dad for christmas.....they work by detecting a heat source.so you dont need to worry about blood trails.you could actually take that on your bear hunt and detect if there are any bears close by,just point the thing in the direction you want to look and the screen will light up if it detects any heat.it will work in the summer also because it detects heat changes..as far as how good they work i really wont know until next years deer season,but from playing around with it,it seems to me that its gonna work just fine....hope this helps ya,JB
[This message has been edited by JB CORPORATION (edited 01-10-2001).]
