Honeywell Activlink RDWL313P wireless door bell

Transmitter not included. Can be found at Canadian Tire or Amazon Representing the premier in performance and versatility, Honeywell Wireless Doorbells and Push Buttons are easily accessible and easily installed. This wireless doorbell and push button set includes high quality sound (80dB) and comes preinstalled with 4 tunes. Featuring a range that's capable of reaching up to 250 ft, this portable wireless doorbell and push button can be connected with up to 4 transmitters simultaneously (this would include: push buttons, awareness devices, door contacts and motion sensors). A prolonged battery life of 2 years.