Voltage measurement range:±50V, error less than 0.03V Current measurement range:±50mA, error less than 0.03mA PWM Signal output:Frequency 1-150 kHz adjustable, duty cycle 0-100% adjustable, high level fixed 5V, driving current Less than 20 mA, with short-circuit protection (Note that this PWM output is to 12V or 2V systems, as 5V is considered low level). Voltage signal output±12V can be set, factory default 0-10V, accuracy after calibration 0.03V, driving current 20mA, with short circuit protection. Current signal output:0-24mA settable, factory default 4-20mA; accuracy after calibration 0.05mA, resistance Less than 500 ohms. Display specifications:2.0 inch TFT color screen (320x240 pixels) Digital Encoder Knob (20 steps per revolution with push button) Connector plug specifications, 15EDGK3.81(9P) Working environment:0-40℃, relative humidity Less than 80% (The product printed words depending on the batch, but this does not affect use) Color:As Shown Material:plastic Package Contents: 1 * PWM Signal Generator Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.