The SportTrainer SD-1225E compact waterproof Remote Transmitter offers up to 16 stimulus levels and a choice of continuous or momentary static stimulation, which with proper training, a dog will learn to associate with a command. In addition, you have the option to send tone or vibration stimulation signals to the Receiver Collar and the ability to control a second or third collar (purchased separately) at distances of up to 1200 m. The lightweight, waterproof Receiver Collar features a sli..