With the Chamberlain Portable Wireless Intercom, you can expand the reaches of your estate"s intercom system outside of your home"s walls. This Chamberlain Wireless Intercom enables you to speak to guests from anywhere in your house. Easy to use and install, the Chamberlain Portable Wireless Intercom simply runs off eight AA batteries — no wires or power connections required. The Chamberlain Wireless Intercom is compatible with most Chamberlain Intercoms, so you can take this indoor/outdoor wireless intercom with you whenever you step out of the door. This portable intercom offers a 1,000 foot range. Chamberlain Wireless Indoor/Outdoor Portable Intercom: * Speak to guests from anywhere in your house * No wires or power connections required * Up to 1,000 ft. range * Infinitely expandable intercom * Easy to use, easy to install. Requires eight AA batteries * 1-year Warranty