Module Heat: Input and output voltage is too large or the module is , 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: -40℃~75℃ Material: plastic colour: Green Package Contents: 2 x Low Frequency Power Amplifier Module 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.