Description: 【Adjustable Gain】: Dynamic microphone amplifier, the gain is adjustable from 12db to 39db, which can satisfy dynamic microphones with different sensitivities, and avoid excessive gain and unnecessary noise floor. 【Applicable To Many Occasions】: Sing on stage, improve the radio, and detonate the auditory experience. Music production with adjustable clean gain to activate your dynamic mics. The instrument picks up the sound, the sound is more surging, and the details are more obvious. Live performance, easier to sing, prominent vocals. 【Long Battery Life】: The Microphone preamplifier can be charged for 2 hours and standby for 8 hours, and there are no restrictions on indoor or outdoor use. 【Amplifier For Dynamic Microphone】: With a high definition display, it can display power, level, and gain, which is very convenient. 【Small And Portable】: The size of dynamic mics booster is 3.5cmx3.5cmx13cm/1.38inchx1.38inchx5.12inch, with exquisite appearance, small and portable, with metal shell. Specification: material: metal Size Chart: 3.5cmx3.5cmx13cm/1.38inchx1.38inchx5.12inch Package Includes: 1 x Dynamic Mic Preamp 1 x charging cable 1 x packing box 2 x Aprons Note: Please allow slightly errors due to manual measurement and different monitors.