Module stressed: 1. The dual mode, the duty cycle is 0.1% good model; The lock function, prevent wrong operation;2. The frequency and duty cycle, LCD LCD is very clear, using encoder potentiometer to adjust, very convenient; PWM output frequency and duty cycle can be set separately;3. The module is described: PWM output, frequency and duty ratio can be separately;4. The duty cycle of the upper and lower limits can be set up; KPWM switch, and PWM output can be turned on and off a key;5. The wide frequency range and high precision; Serial communication is possible;model: XY-PWM1Normal mode: Frequency range 1 hz~000~150 KHZ duty cycle, duty ratio 1%Good mode:Duty cycle 1 hz to 15 KHZ range of 00.0~0.1% duty cycleIs divided into four frequency range, automatic switch:1. XXX (no decimal point): a small unit is 1 hz, value range is 1 hz ~ 999 hz.2. X. (decimal point in ), small unit 0.01 KHZ, and the value range is 1.00 KHZ to 9.99 KHZ.3. .Decimal point X (10): a small unit 0.1 KHZ; Values range from 10.0 KHZ to 99.9 KHZ4. 7.0.x.x.X (decimal point in dozens, hundreds of): a small unit 1 KHZ; Range of values is 1 KHZ to 150 KHZSuch as frequency display: 100 means that the PWM output 100 hz pulseAll save the parameter set to turn it off.parameters:Working voltage: 3.3 ~ 30 v.The frequency range: 1 hz ~ 150 KHZ normal mode; A good pattern 1 hz to 15 KHZThe frequency accuracy: precision in every range of about 2%Load capacity: The signal can be about 5 ~ 30 ma output currentThe output amplitude, pulse width modulation amplitude is equal to the power supply voltageThe environment temperature: - 20 ~ + 70 .Material: plasticcolour: grey blackPackage Contents:1 x Signal GeneratorOnly 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.