brand new and high quality Features: Made of high quality ABS and electronic components, it is solid, durable, and good performance, long service life. Knob operation, immediately after adjusting the response output, no delay. This module can be used with computer, PLC, DCS and some other equipment. Large LCD display shows the testing results clearly, easy to read and operate. It features multiple functions, including PWM mode, pulse mode, signal source mode and sine wave mode. Strong signal load capacity that the max. output current is 30mA. Signal generator only, other accessories demo in the picture is not included! Specification: Material: ABS, Electronic Components Power supply voltage: 7-12V Product function: PWM mode, pulse mode, signal source mode, sine wave mode PWM mode: voltage, frequency, duty cycle are adjustable; accuracy is up to 0.1%; voltage range: 1-24V, frequency range: 1-150KHZ, duty cycle range: 0- Pulse mode: start delay for time T0: 0-60S, high for time T1: 0-60S, low for time T2: 0-60S, pulse number PulseNun: 1-60000, accuracy 0.001S Signal source mode: adjustable voltage source 2-10V, adjustable current source 4-20mA Sine wave mode: 1-1000HZ adjustable Signal load capacity: The maximum output current is 30mA (Note: This product is a signal source which cannot drive high power loads directly.) Size: app.7.9 x 4.3 x 41cm/3.11 x 1.69 x 16.14in Hole size: app.7.6 x 3.9cm/2.99 x 1.54in Color: for Grey Quantity: 1 Pc Tips: This module have no RS485 communication interface. Note: No retail package. Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 x Signal Generator