Foxpro X24 with the MFK sounds. I have a refurbished X24 that I bought from a supplier and I've been running it for several years without a single problem. The internal recharable battery is nice, the remote has everything you'll need for calling. You can program call sequences, you can change the color of the lights to more red, the sounds are loud and crisp even at higher volumes. I'm sure there are other callers that work just fine, but I bought an entry level and I repeat, entry level, icotech 4 or 5 years ago when I first started and it left a lot to be desired. The remote would lose connection even in open fields and that would upset me to no end, having to get up and reset the caller in the middle of a stand. I then got a foxpro without a TX1000 remote and it worked decent but I always wanted more volume and I had to remove the batteries to recharge them. Anyway enough with my rambling. Happy hunting!
Edit: I reread your statement and you said simple, you can use as many or as few of the features as you want on the X24 and the TX1000 remote. All how you want to run it.
Edit: I reread your statement and you said simple, you can use as many or as few of the features as you want on the X24 and the TX1000 remote. All how you want to run it.