I needed an e-caller (to get away from the hiss of the old tapes in the ole 512) for the local yotes. Much reading on reviews from major manufactures lead me to the Icotec GC 300. After the brown truck stopped by, I charged the caller with new batteries and stepped outside. Got most of the neighbors dogs whining and howling and had a few crows wondering what was happening below as they circled the house. Two days later I went to the woods to hear the GC 300 in its glory. I was convinced I would have a yote in minutes after powering the unit which did not happen. Volume was a concern with the crows as I am used to much more sound. With the yote calls I believe volume is good. Yotes can hear a vole moving under 18 inches of snow and should be able to hear this unit. I had dogs 1/4 mile away whining and barking while running the yote howling calls. I was disappointed on the cottontail distress volume but the woodpecker sounded right to me. After 2 hours and no yotes I moved down the road for another uneventful hour. This caller is programed for 12 factory calls and can not be changed or replaced. I give this caller a 3 on a 5 scale for the volume and limited calls. The cheapest FP is 3 times the cost of this caller. That's my story and hope it helps anyone who is limited to funds as I am that wants an e-caller.