I don't know where to start. This product has so many uses, it's scary. Not only can you see fish under water, but you can see structure, bottom composition, etc. Can't get a lure unsnagged? Drop this down and take a look. You can clamp it to the back of your vehicle to assist in hooking up to trailers. Put the camera on top of a ground blind to see deer approaching from the rear. I could go on and on. It's small enough to keep in a pocket and super easy to operate. Unless the lake you're fishing is as clear as a swimming pool. don't expect too see real far with this. In murky water, or under the ice with low light, you may only see 2-3ft away. I would not use this to "search" for fish while ice fishing in murky water. But to see what is nibbling on your line, what the bottom looks like or if there is structure, then this works great.