5V-12V NE555 Frequency Adjustable Pulse Generator Module For Arduino

 Size: 28mm x 11mm x 12mm/1.09" x 0.43" x 0.47" (inch) (approx)
　
Specifications:

1. Onboard NE555 IC.

2. Single channel signal output, the output duty cycle about 50% square wave.

3. Plate load resistor, adjust the resistance to control the output frequency.

4. Onboard power indicator.

5. Working voltage: 5V~12V.