Circuit control: 12V step-down circuit, constant current output (current and voltage are adjustable) Output: Max 4A Scope: 3W-4.5W 405/445/450 / 520nm red and green blue and other laser drive power Size: 32 x 50.5mm (width * length), component height includes aluminum base 20mm Input voltage: 8-14V Slow start time: 60S (due to a minute delay, in the debugging, please do not look directly at the optical port, so as not to damage the eyes, remember ) TL modulation instructions: 0-5V voltage signal (0 is off, 5 is open, the frequency determines the laser light flashing speed) Colour:As Shown Material:PC+metal Package Contents: 1 x 4A Circuit Power Driver Board Only 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.