Daytech Dog Door Bell Wireless Doggie Doorbell for Potty Training with Touch Button(1 Receiver & 2 Transmitters)

$35.99 (as of 16. October 2019, 23:58) & FREE Shipping. Details $32.99

Dog Doorbell,the idea is for potty training not to scratching,barking,and whining if they learned this ring meant going outside or inside.
Trigger simple:Just touch or slip over the button lightly to activate,easy for smaller dog to use. Any small or big dogs can touch the activator through the nose or claw to activate the doorbell.
Easy installation:use 3M double-sided tape to stick it on the floor,wall,front and back of the door, even on a board and then place anywhere you need.And flexibly increase or decrease the receiver and transmitter according to your needs.