The Dogtra SureStim H-PLUS RX is the extra collar for SureStim H Plus Shock Collar so you can add up to 2 dogs to your system. This collar is fully waterproof and is ideal for medium / large size dogs over 20 lbs.
For dogs over 20 pounds
Range up to 1/2 Mile
Low to High Power
Nick, Constant, and Non-stimulation pager vibration