K9-400 K9 Handler 3/4 Mile Remote Trainer3 4 mile range Stimulation levels 1 to 100 Configurable boost level Uses RX 090 receivers Shock proof and water proof E Collars may ship separately [split] The K9 400 K9 Handler employs proprietary "blunt" stimulation making it the most humane and effective e collar trainer available. This model is the same as the ET 400 in all aspects except it is packaged in a hard plastic carrying case, contains additional 3 4" bare contact points, a quick release