3. The signal source mode of this module has voltage and current calibration function 2. Multifunctional support for PWM mode, pulse mode, signal source, signal source mode, sine wave mode, and RS485 Modbus communication Features: 1. In signal source mode, the voltage source is adjustable from 0-10V and the current source is adjustable from 0-20mA 4. Voltage, frequency, and duty cycle can be adjusted in PWM mode, Weight: 0.12676580065 Pounds, Manufacturer: puhae