Grandstream HD IP Audio Door System GDS3705HD audio options with up to 1. 5m of audio input and 3m of audio output Built in RFID chip reader for keyless entry Supports SIP calls to IP phones to facilitate communication Built with a metal casing to make it weatherproof and vandal resistant Integrated PoE to power the device and provide a network connection Built in dual microphone and HD loudspeaker with advanced AEC offers intercom functionality IP Audio Door System The GDS3705 was built for
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