TWO-YEAR WORRY-FREE GUARANTEE - MAONO provides every MA100 mic preamp customer with TWO-Year-Warranty! If you are not satisfied with this microphone preamp or have any other questions, please feel free to contact us before returning. we promise to offer you satisfactory solutions. ((NOTE: MA100 DOES NOT WORK WITH CONDENSER MICROPHONES,Requires 48V phantom power, which is not included in the product.). LIGHTWEIGHT & PORTABLE - The Maono Preamp Mic Gain is 4.1x1.8x1.6inch, compact and easy to carry, convenient for you to use on many occasions, and boasts a high-quality metal cg that is both robust and durable while providing efficient rejection of noise and electrical interference. EXCELLENT COMPATIBILITY - Maono MA100 microphone preamp is well compatible with most dynamic and ribbon microphones, which are with low output signals, and thus require a high sound boost. Compatible mics include Shure SM7B, Electro-Voice RE20, JRS-34, MAONO PD200X/PD400X/PD100, etc. (NOTE: MA100 DOES NOT WORK WITH CONDENSER MICROPHONES.). STUDIO QUALITY SOUND - With advanced circuitry design, the MA100 Mic Activator translates into less total harmonic distortion (THD) of 0.01%. With a high SNR of 118±1dB, the microphone's signal strength is enhanced, delivering an exceptional auditory experience that's free from unwanted noise and interference. (NOTE: Requires 48V phantom power, which is not included in the product.). 30dB OF NOISE-FREE GAIN - Maono mic preamp provides up to +30dB clean gain for passive microphones. The Pream Mic Booster gives a loud sound to your microphones for vocal, instrumental recording, and live performance.