1, The thermostats provided RS-485 communicating interface and MODBUS protocol for system integration; 2, Models are available for heating, cooling or ventilating control of 2-pipe or 4-pipe fan-coil units; 3, The thermostat can be controlled by local manually, master controller or operating by the BAS system; 4, Temperature Range: 5 35°C adjustable; 5, Power Supply:12Vdc or 24Vac ±10%; 6, Current Load: 0.8A run, 3A inrush; 7, Dimension: 86x86x13m(H x W x D); 8, Output: SPST relay.