... -304 VILLA INTERCOM SYSTEMFeatures DIY system with PLUG & PLAY connection.Up to 4 door stations and 4 indoor phones.Intercom between indoor ... phone.Anti-vandal, waterproof, cast aluminium, surface mount.Night viewing with IR LED.Handsfree indoor phones are optional.Pin-hole door ... cable(10meters)1 piece User's manual 1 pieceDoor station with indoor phonesVI,V22VI,V21,V23VI,V12,V18 Video door station ...