One device I can steer you away from is this Motorola over the collar model. Earlier Bluetooth 2.0 Class 2 10m technology with extremely uncomfortable over the collar receiver & earbuds.
 
Motorola can do much better, & would score a marketing coup by giving us what we really want which is a 100m Bluetooth 4.0 w/ audiophile amplifier in a beltclip package with standard class AA rechargeable batteries.
Mannock