Comsmart Smart Wireless Dog Door Bell, Doggie Doorbell for Pet Potty Training Communication Go Outside Press Button with 38 Melodies 4 Volume Levels LED Flash (1 Receiver & 2 Transmitter), White

• Easy Installation: The transmitter has the function of self-generating, no need to replace the battery. Plug the receiver directly into the power socket. The transmitter can be installed on multiple locations with 3M tape. When the transmitter is pressed, the receiver plays a ringing tone. Applicable Object: The dog can press the transmitter with his paw to touch off the doorbell. The door bell is suitable for medium and large dogs. Please consider your dog's size before purchasing. Customizable: There are 38 polyphonic ringing tones and 4-level adjustable volume (45-85db). You can set your favorite ringtone. Receiver and transmitter working range: 328 feet (outside) 131 feet (indoor). The doorbell is made of high-end PC. It is a wear-resistant and sturdy plastic, which can make the doorbell more exquisite. Multipurpose: It is not only suitable for dogs but also can be used as a nursing pager for the elderly/disabled/pregnant women/children. They can press this transmitter when they need help in an accident. Memory Function: The wireless doorbell can remember the last doorbell ringing tone and volume after power off. You do not need to reset the receiver when the next time it is powered on.