ADD-ON WIRELESS PROTABLEINTERCOM 1,000 foot range with no wires or power connection required Crystal clear, secure 900MHz digital communicationAdvanced features include voice activation and monitor modeBroadcast to all channels simultaneously or speak to one party with Secured LinkSingle or multi-channel communicationExpand up to 12 units per networkCompatible with wireless intercom models NDIS, NTD2, and NLS11-year warrantyRequires 4 AA batteries per unit (not included) BRAND : CHAMBERLAIN
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