Exchange the data between PC and EDX system. (EDX protocol is exclusively own by Lite-Puter) Compatible with 3rd party system or centralized control system. It can control the EDX system through standard RS232 interface. Connectable to PC by RS-232 cable.SpecificationsPower: DC 12VSignal Input: RS-232Signal Output: EDXDigital signal connector: 4-pin terminal/ RJ-12Dimension: 132 x 76 x 36 (mm)Weight: 220g