Specification description: Circuit control: 12V step-down circuit, constant current output (current and voltage are adjustable) Output Specification: Max 5A Scope of application: Driving circuit of 1W-3W-4.75W 405/445/450/520nm red, green and blue lasers Dimension specification: 32.5*50mm (width*length), element height 24mm aluminium base Frequency control: 0-20Khz Modulation voltage: 0-5V (0V off, 5V on) Input voltage: 8-14V TTL modulation instructions: 0-5V voltage signal (0 is off, 5 is on, frequency determines the speed of laser flashing). Positive and negative poles are as follows