Battery Distributors carries a full line of APX 4000 Radio Surveillance Equipment & Earpieces, OEM Brand APX 4000 Radio Surveillance Kits, Motorola APX 4000 Radio Earpieces, APX 4000 RADIO 2 wire surveillance kits, APX 4000 RADIO 3 wire surveillance kits, APX 4000 RADIO Bluetooth Surveillance Kits, APX 4000 RADIO Listen Only Earpieces, APX 4000 RADIO 1 wire surveillance kits