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

[Anti-interference & Multifunctional] This doorbell doubles as an FM wireless intercom doorbell that wont be affected by WiFi disruptions! It also wont 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.
[IPX55 Waterproof and Built-in Rechargeable Battery] The intercom doorbell is waterproof even in bad weather conditions like snow and rainstorms. Features low power consumption, built-in 2000mA battery, and an included charging base! Full battery lasts 4-6 months for the transmitter, and indoor machine lasts 1-2 days on a full charge.