This is a wireless doorbell specially designed for pets with sensitive waterproof touch buttons, you can train your pet to touch it with their nose or to avoid barking or scratching. No scratches No barking The doorbell saves your door with just , even a cat can activate it Random Placement - On the door, On the glass, , On the floor. Intelligent Pet Doorbell - with distinguishable AB door function, different callers can match different ringtones to distinguish the needs of from different areas. Open area working distance 1000 FT/300 meters. Note: Actual signal reception varies depending on the environment and obstacles.(Data from factory laboratory) Waterproof Design - Suitable for indoor/outdoor use. Transmitter with LEDS that light up when touched. Product name: Wireless Doorbell Receiver: lights up when rings. Music: 60 pieces of music. Volume: 5-levels volume (adjustable flashing light only) Transmitter:uses 1 x 12V23A battery Receiver:Plugged in for use (100-240V) Transmitter size: 67mmx15mm Receiver size: 56mmx56mmx20mm Plug Type:US Plug, it applies to Canada, India, Mexico, Thailand, Taiwan, the , the Philippines and so on. Voltage:AC110V Colour:White Material:ABS+Electronics Package Contents: 1 * pets Doorbell button Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.