Simplified Product Title: CROSSPOINT Extra Add-On Battery Free Plugin Receiver for Wireless Doorbell Alert System, Black

SadoTech's Crosspoint expandable sets allow you to add 20+ buttons, chimes, and sensors within one synchronized system, making them ideal for larger homes or spaces with several entranceways or multiple floors. The chime features 52 different tones at 4 adjustable volume levels, providing a fully customizable solution to suit your needs.

Need to be able to hear your Crosspoint doorbell from more places in your home or office? The plugin chime syncs seamlessly with your current Crosspoint system - simply plug it in and you're good to go.

The Crosspoint expandable doorbell base set includes 2 buttons and 2 plugin chimes, with the ability to add more as required. You can set your Crosspoint chime to any of our 52 available tones, and the modern, sleek doorbell design will fit seamlessly into your space. The 100% waterproof button can withstand rain and storms, even without an awning or covering.

As seen on Business Insider, Fox, ABC, NBC & CBS News, our doorbells are "built well, and [have] a nice minimalist style." They're great looking, loud, and reliable.

The CROSSPOINT EXPANDABLE DOORBELL SYSTEM in White, Black, or Beige, now with new and improved chimes/ringtones, includes an extra plugin receiver. This expandable system allows you to custom-build your own home-alert network with up to 20+ additional receivers, transmitters, and motion or door sensors.

Assign unique ringtones to each transmitter to instantly know which one was triggered. With over 50 different melodies and ringtones, this is the ideal wireless doorbell system for multi-entry structures. Enjoy four levels of adjustable volume, from 25db to 110db.

Featuring long-range operation of over 1000 feet, the Crosspoint system can penetrate steel doors, exterior walls, and interior walls, with no new wiring required for installation. Simply plug the receiver into an electrical outlet (no batteries needed).

Want to listen to our chimes/ringtones before you buy? Scroll down to the Technical Specs section and click the Specification Guide link to download the PDF file, which allows you to play all 52 ringtones. We've developed a custom music chip in our doorbells that includes carefully selected, high-quality sounds.

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