Fangrui Product Details 1. With Isolation Function, The Power Board Test Conditions Input Dc12v, The 12v Output Is About 13-14v Without Load, 2. The 18v Output Is About 19v When No Load Is Applied, And Decrease A Bit After Being Loaded. 3. The Power Amplifier Circuit Has A Certain Voltage Adaptability Range, It Doesnt Matter How High Or Low It Is, A Few Volts. 4. If Installed In A Car, The Actual Working Voltage Of The Car Is About 13.5v, And The Output Be Higher. 5. This Board Does Not Have A Voltage Stabilizing Open-loop Circuit, Has Small Ripple, Good Transient Response, High Efficiency And Low Heat Generation, And Is Suitable For Power Amplifiers. Description: 1.output Power: 200w 2. Input Voltage: Dc10-15v 3. Output Current: 200w/output Voltage = Output Current. That Is, The Higher The Output Voltage, The Smaller The Current. Specifications: 18v Output Colour:as Shown Material:pcb Size:75x70x36mm Package Contents: 1x Power Amplifier Module 1x 10a Fuse Only The Above Package Content, Other Products Are Not Included