Features: 【HIGH QUALITY MATERIAL】The mic preamp offers a dependable, slim profile design and is constructed of premium aluminum profile to ensure reliable operation in difficult stage applications. 【USES 48V PHANTOM POWER】Professional dynamic mic preamplifier activator that uses 48V phantom power to add 25dB of clean gain to dynamic and ribbon microphones while dropping the noise floor to an astonishing -31dB.  【MIC PREAMP FOR STUDIO AND BROADCAST RECORDING】Boost the signal of quiet instrument sources like vocals, percussion or acoustic instruments, while maintaining the natural sound of your microphone. (DOES NOT WORK WITH CONDENSER MICROPHONES) 【LIVE SOUND AT ITS BEST】The preamp is durable enough for the stage, and quiet enough for the studio. For live sound, you can reduce line noise on long cable runs and improve the gain before feedback ratio for public speakers or singers. 【PROFESSIONAL SOUND CLARITY】With -31dB noise rating you'll be able to cut through the mix without adding feedback or unwanted hiss and hum. 【DESIGNED FOR OUTSTANDING RESULTS】Microphone booster is perfect for podcasts, live streaming, radio broadcasts, live sound, and studio recording.  Specifications: Material: Aluminum profiles Gain: 25dB Frequency Response Range: 20Hz-20kHz±1dB Input Impedance: 1.5kΩ Bottom Noise: 10uV Maximum Output Level: 8.4 dBV@THD=0.5% Current Consumption: 3mA Power Supply: 48V phantom power OUTPUT: Connect the amplifier and sound card, mixer or other equipment with 48V phantom power using a three-core XLR, and be sure to turn on the 48V phantom power INPUT: Connect the amplifier with a three-conductor XLR to a dynamic or aluminum microphone. Item Size: 120 * 45 * 37mm / 4.72 * 1.77 * 1.46in Item Weight: 96g / 3.39oz Package Weight: 155g / 5.47oz Package Size: 15.7 * 9.2 * 5.7cm / 6.18 * 3.62 * 2.44in Package List: 1 * Microphone Preamplifier 1 * User Manual (English)