Power supply: 12VDC ± 10%、500mA Type of cards:EM or M1 Output current(solenoid valve):300mA Communication interface: RS485 Baud rate:≤19200bps Communication distance:1200m(when the Baud rate is 9600bps) Dimensions:165mm×113mm×35mm(L×W×H) Environmental temperature: 0℃~+45℃ Relative humidity: ≤ 90%RH Storage Temperature: 0~70°C Charge mode: collect fees by time or by flow