The newer Electronic Callers are very nice,I have the FoxPro Shockwave and it can be set up really far away and it has a large assortment of sounds and plenty of room for extra sounds and it has several special features on it!
dude i am hooked to!!! great story! sometimes i let the caller play for 15-20 mins
some times i play it for 30 sec turn it off for 2-3 mins repeat. i wouldnt worry about it!
just have fun and get out more!!