Grandstream GDS3705 HD IP Audio Door System HD audio options 1.5m of audio input 3m of audio output Built-in RFID chip reader Keyless entry Supports SIP calls to IP phones Built with metal casing Weatherproof Vandal resistant Integrated PoE Built-in dual microphone HD loudspeaker Advanced AEC offers intercom functionality Mounting - Wall-Surface, In-Wall Dimension (HxWxD) and Weight - In wall 217mm x 120mm x 11.6mm; On Wall 173mm x 80mm x 36mm 0.635Kg Compliance - FCC: Part 15 subpart B;Part15C;MPE CE: EN55032 Class B; EN61000-3-2; EN61000-3-3; EN50130; EN300 330; EN301 489-1/-3; EN60950-1; EN62311 RCM: AS/NZS CISPR32;AS/NZS4268;AS/NZ60950 IC:ICES-003;RSS310

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