... accuracyDigital setting: highest frequency x ± 0.01%; simulate setting: highest frequency x ±0.02%Frequency resolutionDigital setting ... : 0.01Hz; simulate setting: highest frequency x 0.05%Torque increaseAutomatic torque ... serial port, can switch with multi modeFrequency sourceDigital,simulate voltage,simulate current,impulse, serial port,terminal,mult-speed, ...