1. XL4016E1 DC Step-Down Module 2. Output Adjustable 8A With Stabilized DC-DC High Power Voltage Regulating Board Module 3. With Digital Display Module 4. Regulator Module 5. Easy To Carry, Requires Professional Installation To Avoid Product Damage Product Name: Regulator Voltage Regulation : PWM Modulation Input Voltage DC 4-40V Output Range: Dc1.25-36V Maximum Current: 8A Maximum Power: 200W Conversion Efficiency: 94% Switching Frequency: 180Khz Note: Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use Colour:As Shown Material:PCB Package Contents: 4 x XL4016E1 Step-Down Module With Digital Display 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.