Voltage: 3.3V, 5VPort: the digital quantity levelThe output load voltage: 0 - 24VThe output load current:Less than 5A (more than 1A need to add heat sink)The product instructions:PWM signal for high level effectivelyWhen the PWM for high level (3.3 V to 3.3 V) :As the power supply voltage, between V + and V - working indicator, work loadWhen the PWM is low level (0 V to 0.5 V) :V + and V - between 0, work lights out, don't work loadColour:redMaterial: ABSPackage Contents:8 x IRF520 moduleOnly 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.