The GDS3705 was built for users looking for a strong audio-only facility access and security monitoring solution that can be deployed in environments of all sizes. HD 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