Features 1、100% brand new and high quality. 2、Made of high quality material, durable and long service life. 3、Used as a square wave signal generator to generate square wave signals for experimental development. 4、It can be used to generate a square wave signal that drives the stepper motor driver 5、This module can generate adjustable pulses to control related circuits Specification Features: 1. 100% brand new and high quality 2. Made of high quality material, durable and long service life. 3. Used as a square wave signal generator to generate square wave signals for experimental development. 4. It can be used to generate a square wave signal that drives the stepper motor driver 5. This module can generate adjustable pulses to control related circuits Specification: Condition: 100% Brand New Main Chip: NE555 Input Current: ≥100MA Maximum Output current: ≥15MA (5V power supply, V-PP is greater than 50%), ≥35MA (12V power supply, V-PP is greater than 50%) Size: Approx. 3.1 * 2.2cm / 1.2 * 0.9in Package List: 5 * Wave Signal Generator Package List