Fangrui Product Details Module Heat: Input And Output Voltage Is Too Large Or The Module Is Damaged, It Generate A Lot Of Heat, Equipped With Heat Sink Module Features: Positive And Negative Power Led Indication Application Scope: Small Signal Amplification, Audio Signal Amplification, Motor Drive, Etc. Module Interface Type: 5.08 Card Holder, Sma Signal Input And Output. Specification: Item Type: Low Frequency Power Amplifier Module Module Model: Opa541 Input Signal Form: Single Ended Input Voltage Range: 2vpp (less Than Supply Voltage) Module Input Impedance: 10k Ohms Operating Frequency: 20hz-100khz Module Supply Voltage: 10v~40v Module Supply Current: 5a Input Voltage Range: 68vpp When The Supply Voltage Is 40v Input Current: 5a Input Power: 50w (maximum) Module Gain: 3.3x-82x, First Stage Amplification Adjustable Up To 25x, Second Stage Amplification Is 3.3x Module Operating Temperature: -4075material: Plastic Colour: Green Package Contents: 1 X Low Frequency Power Amplifier Module Only The Above Package Con