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Name: 4CH Audio Indoor phone Decoder for Audio Door Phone System
Model: PST-ADD04
4CH Audio Indoor phone Decoder;
◆Support 4PCS indoor phone; 
◆Material: Plastic; 
◆Shell size: 86*86*30mm; 
◆Only work for PST-ADI03;
◆Working temperature: –10°C to +50°C; 
◆Comparative Humidity: 5%--95%; 
◆Transmitting distance: 100M;
Power supply: DC12V; 
User Manual
Youtube Video
PST-ADD04 Specifications
Name  4CH Audio Indoor phone Decoder
Model PST-ADD04
Power DC12V(One system only need one power supply)
Maximum Transmitting distance 100 meters
Connetion calbe From outdoor station to every Decoder user 3 wire(RVV3)
From Decoder to every indoor phone user 2 wire(RVV2)
Working temperature –10°C to +50°C
Comparative Humidity 5%--95% non-condensing
Material Plastic
packing size  
Gross Weight  
PST-ADD04 Features & Functions
Application Can be used in apartments,villas,hotels and offices etc
Basic Functions Support 4pcs indoor phone
If each floor is less than 4 room, better place a decoder on each floor
PST-ADD04 Package List
Decoder x1
Connector x4