Panasonic KX-TDA5161 KXTDA5161 KX TDA5161 Hybrid IP 4-Port Doorphone w
"Panasonic-KX-TDA5161 Brand New Includes One Year Warranty, The Panasonic KX-TDA5161 is a 4-port doorphone/door opener card (DPH4). It supports up to 4 KX-T30865 doorphones. The KX-TDA5161 is also equipped with 4 dry contacts for connection to electric door strike or other compatible type equipment. Maximum one KX-TDA5161 per system is supported. KX-TDA5161 Features: Doorphone/Door Opener Card, Support Up to 4 Doorphones, 4 Dry Contacts For Electric Door Strike, Maximum 1 Per System"