Wuloo Wireless Intercom Doorbells for Home Classroom, Intercomunicador Waterproof Electronic Doorbell Chime with 1/2 Mile Range 3 Volume Levels Rechargeable Battery Including Mute Mode(Black, 1&2)

* [Simple Installation & Expansion!] Secure this outdoor doorbell chime to your door or wall with the included screws for ultimate security. The wireless intercom doorbell is expandable, so you can extend nearly any indoor or outdoor system, even to a set of 2 transmitters and receivers each! * [Long Range & Easy Sound Adjustments] This wireless doorbell transmits at a distance of up to 1/2 Mile! Customize your doorbell with 20 kinds of chimes and 3 volume levels! * [100% Satisfaction ] Love it or your money back! We provide a lifetime service for our intercom doorbell. Please feel free to contact us if you have any questions or concerns about your purchase. * [Anti-interference & Multifunctional] This doorbell doubles as an FM wireless intercom doorbell that won’t be affected by WiFi disruptions! It also won’t interfere with your other smart devices. Buy two receivers and use as a set of walkie-talkies, or use the mute mode on the indoor intercomunicador to turn off the unit when you want silence. * [IPX5...