Feature:1. HIGH GAIN: Mic preamplifier enhances your sound experience with balanced amplification circuitry with 6.5 single ended input gain of 22db and XLR balanced input gain of 27db, providing clean, transparent gain.2. 48V PHANTOM POWER: Mic preamp is compatible with a range of microphones, including for SM7B, for 55SH and other popular models. Comes with 48V phantom power for use with both dynamic and condenser microphones.3. LOW NOISE: Microphone preamp features a unique, fully balanced circuit design that produces ultra low noise and clean sound, ensuring minimal noise and adding no sonic coloration to your recordings.4. BLACK METAL CASE: Dynamic condenser microphone booster's black metal casing is not only rugged, but also low noise by effectively eliminating most EMC interference.5. COMPACT AND LIGHTWEIGHT: Microphone preamplifier is compact and lightweight, making it easy to carry and store. Perfect for home studios and professional studios, recording, podcasting and live streaming.Specification:Item Type: Microphone PreampMaterial: Aluminum AlloyColor: BlackBattery: Polymer Lithium Ion Battery (Built In) Capacity: 1000 MAhInput And Output Interface: XLR Dual Purpose Socket (Can Be Connected To The XLR Head, 6.5 Plug)Circuit: Balanced Amplification CircuitGain: 6.5mm Single Ended Input Gain 22db, XLR Balanced Input Gain 27dbSupport: 48V Condenser Microphone, Dynamic MicrophoneWorking Time: Dynamic Microphone Can Be Used Continuously For More Than 10 Hours, Condenser Microphone Can Be Used For About 3-5 Hours When 48V Is Turned On (Different Microphones Perform Differently, Please Do Not Turn On The 48V Switch When Using Dynamic Microphone).Package List:1 x Microphone Preamp1 x Sound Cable1 x USB Power Cable