Specification Brand : Tissting BulletPoint1 : 3 Ports: After the microphone and music are amplified by stereo sound preamplifier, they can be output independently or mixed output. There are three output ports in total, and the mixed output port can directly drive headphone to listen, effective gain audio, improve sound quality BulletPoint2 : Interface Size: Stereo audio preamplifier 3.5mm interface of preamplifier with bias can be used with electrets and common condenser microphones, and the 6.5mm interface is a dynamic microphone, which can amplify wired and no wire microphones BulletPoint3 : Amplify Times: Stereo audio preamplifier 6.5mm port of the dynamic microphone is amplified by 75 times, the 3.5mm port condenser microphone is amplified by 22 times, and the stereo music input 3.5mm port port is amplified by 5 times, With volume adjustment knob, the volume can be adjusted freely. BulletPoint4 : Ultra Low Noise: The all aluminum housing of mic headphone amp completely insulate electrical interference, and the rail to rail OP amp MC33202 guarantee the highest sound quality at all output levels, with ultra low noise operability and excellent sound performance, which is ideal for desktop sound systems. Please use excellent quality low ripple power supply, poor power supply quality is easy to produce hum BulletPoint5 : Widely Applicable: Sound mixer with two volume control knobs, which mix multiple channels into one rail and compatible with multiple devices. Suitable for musical instruments, microphones, mobile phones, computers, power amp equipment, speakers, small stage settings, drum sets or submixes, and other sound devices, with DC5‑12V power supply 5.5 x 2.1mm power hole Color : #511 ExternallyAssignedProductIdentifier : 5603223284889 IncludedComponents : No ItemName : Stereo Audio Preamplifier, DC 5-12V Headphone Amplifier with 3.5mm 6.35mm Jacks, Turntable Phonograph Preamp for Electric Guitar Instrument ItemPackageDimensions_Height : 2 centimeters ItemPackageDimensions_Length : 13 centimeters ItemPackageDimensions_Width : 7 centimeters ItemTypeKeyword : audio-component-preamplifiers Manufacturer : Tissting ModelName : Hilitandbirkc1fs7h ModelNumber : Tisstingvagx8k0gmp NumberOfItems : 1 PartNumber : Tisstingvagx8k0gmp ProductDescription : Item Type: Stereo Sound Preamplifier Material: Aluminum alloy Color: Black Power Interface: DC5-12V, 5.5 x 2.1mm