Housmile Wireless Doorbell, Waterproof Chime Kit Operating at 1000ft with 1 Push Button TransmitterBattery Included and 2 Plug-in Receivers, 50 Chimes Easy Installation - No batteries required for main receiver, just plug the receiver into an electrical outlet. Push button can be fixed to the doorframe with the attached adhesive tapes. Over 50+ Different Ring Tones - 52 different music options for you to change according to your mood.4 levels of adjustable volume from 25db to 110db Long Range up to 1000 feet / 300 meters - Either you are occupied in the garden or at the kitchen, it can remind you that someone is calling from outside. High-Performance - ABS material saving more power, ensuring the longer service life Housmile GuaranteeWe are so confident in the quality of our product that we offer a 30 days' refund and 1 year's limited warranty from the date of purchase