Microphone Pre-Amplifier KP100 A small and useful device that amplifies the microphone signal to line level. It accepts dynamic and condenser microphone with internal supply. The circuit is based on the integrated circuit NE5532 that ensures low noise, low distortion, high sound quality and reliability. You can connect it to any linear input of your Home Amplifier. It has two outputs in order to connect it easily to your Stereo Amplifier. FEATURES: Supply Voltage : 9-24VDC max. (Can also be operated with a 9V PP3 battery). Inputs: Jack 6.35mm Outputs: Stereo Phono RCA sockets. Input Impedance: 10 - 47 Kohms at 1kHz. Output Impedance: 47 Kohms (200 ? min). Input sensitivity: 2-10mV. Output: 300mV (1.8V max). Gain: 40db S/N ratio: 85db. Frequency Response: 20Hz to 20kHz +/- 0.5db. THD: 0.05%. Metal film Resistors and good quality capacitors. You can use any GOOD POWER SUPPLY YOU HAVE WITH VOLTAGE 9 TO 24VDC/100mA min. Dimensions (WxHxD): 91X65X39 mm. Colour: Black. 5 Years Warranty. WHAT'S INCLUDED: 1 x Mic preamp. User guide. (English) Business seller information: S.P.C Electronics. Spyros Papakonstantinou. Paparigopoulou 20 Str. 8046 Paphos. Cyprus. Value Added Tax Number: CY 90005904X