Features: 5-band preamplifier EQ Equaliser: supports 5-band adjustment of Sound signals, achieving fine control and equalization of Sound frequency. 3.5mm AUX analog Sound processor: equipped with analog Sound processing function, suitable for connecting various Sound devices. Featuring a vintage VU meter: Equipped with a vintage VU meter, the visual effect is cool and enhances the user experience. Sound processor: capable of processing Sound signals, adjusting sound effects, and improving sound quality. Speaker/amplifier compatibility: suitable for connecting speakers or amplifiers to enhances sound effects. Easy to operate: The operate is simple and intuitive, and it is easy to adjust parameters in various frequency bands. Specifications: Material: metal Size: about 164x108x82mm/6.46x4.25x3.23inch Sound input: Bluetooth-compatible / stereo 3.5mm AUX Sound output: stereo 3.5mm AUX EQ Bands:100Hz / 400Hz / 800Hz / 4KHz /10KHz Bypass function: support Balance adjustment of left /right channel: support Input impedance: 50KΩ Output impedance: 15Ω Frequency response: 5Hz-20KHz THD: 0.003%@1KHz Working voltage: DC5V (≥500mA) Power interface: USB (Type C) Package Includes: 1x Equaliser 1x Cable 1x User Manual note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.