2 Channel PWM Pulse Frequency Adjustable Duty Cycle Square Wave Rectangular Wave Signal Generator Module

Frequency and duty cycle for each channel can be set individually using the onboard tactile buttons or through its RS-232 serial (COM) interface
Operating Voltage: 5-30V, supports MicroUSB 5V input power
Frequency Range: 1Hz – 150KHz
Frequency Precision: 2%
Output Signal Capacity: Up to 30mA output current
Output Voltage: Same as input voltage, or can be independently varied from 5V to 30V with an external power supply input
Frequency and duty cycle settings are saved when the module is powered off
Dimensions: 44mm x 29mm x 9mm (LxWxH)
Ambient Operating Temperature: -30 to 70 degree