Wireless Doorbell KitThe product is shipped based on the color or size of the main image of the product page.Overview:This doorbell comes with a transmitter and a receiver. When a visitor presses the doorbell, loud sound is activated to remind you to open the door. You will never miss a visitor. It can make your life easier and smarter. Ultra-low power consumption, it's your cost effective choice.Features:*The chime is easy to pair with the doorbell hub, easy for installation. Outdoor doorbell button with anti-tamper alarm function.*Indoor doorbell hub is plug and play, no need batteries, low power consumption.*Chose what you like, 58 melodies optional, and 5 levels volume adjustment.*433MHz wireless frequency, 328ft/100m wireless working range in open area.*Rainproof: Doorbell can be installed outdoors, do not worry about being drenched by rain.Hub Specifications:Power Supply: 110/220VACBackup Battery: 3.7V, 300mAh Lithium Battery(included)Consumption: