CHAMBERLAIN NTD2 Wireless Indoor/Outdoor Portable Intercom Convenient communication with guests from inside a home; 1,000ft range with no wires or power connection; Clear, secure 900MHz digital communication; Easy to use & installs in minutes; Expandable with up to 12 units per network; Includes 2 intercoms; 2-year battery life; Requires 4 AA batteries per unit; 1-year warranty Warranty ONE YEAR BRAND : CHAMBERLAIN
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