Speed mode: Continuous adjustment rotary encoder Display: 128 * 64 dot matrix type LCD can display flow rate and speed are two ways to switch between displays The allocation of frequency: 1 ~ 999 times Allocation of fluid volume: 0.1ml ~ 99.9L Time interval: 1 ~ 999 seconds Back to the absorption angle: 0 ~ 360 (18 step) Communication Interface: RS485 External control interface: start-stop control, direction control, speed control (0 ~ 5V, 0 ~ 10V, 4 ~ 20mA, 0 ~ 10KHz optional) For Power: AC 220V 10%, 50Hz/60Hz (standard) AC 110V 10%, 50Hz/60Hz (optional) Power consumption: