This is a low to medium power training unit that covers a 400 Yard Range . It is waterproof and adjustable collar with that has a magnetic on/off switch on the receiver.It uses 5/8” surgical stainless steel contact points and has reduced receiver/collar designed for dogs as small as 10 pounds. The transmitter has a smooth rheostat dial that has a precise stimulation Level (0-100) which can be set to the owner's preferred stimulation. It also has Nick, Constant, and non-stimulation pager and is water-resistant. This unit has 3-color LED battery life indicator for transmitter and receiver to show the battery life of both transmitter and collar/receiver and uses a Lithium Polymer battery for a 2 hour quick charge.