Power supply: 1.5V (3 AA batteries) Standard
 display: 3-inch TN liquid crystal display
 Communication mode: RS485
 Communication protocol: Modbus serial communication protocol
 Response speed: <3s
 Operating temperature: -20°C~50°C
 Operating humidity: <90% (RH) without condensation
 Dimensions: 170*93*29mm
 Weight: about 260g