Main Feature Classical double echo effect, more comfortable singing. LCD screen is easy to set the data. Single reverb and stereo can switch . With feedback function. 5.1 balanced outputs, can be flexible with power amplifier. With center and surround output channels, volume can be adjusted independently. SUB channel frequency: 45—250Hz, auto decay, decay rate is adjustable. 3 bands EQ is for MIC, effect and music. Initial and max volume are for music and MIC. Technical Specification: Output Channel :Main (L/R) / Center / SUB / SURR (L/R) S/N R: Mic 75dB; Music 90dB Max Input Level: Mic 300mv;Music 6mv Max Output Level: Mic/Music 10Vrms Sensitivity :MIC 15mv; Music 300mv Input Impedance: Mic 10K unbalanced; Music 47 unbalanced Output Impedance: 300Ω balanced, 1K unbalanced Crosstalk of Channels: 85dB Feedback: Yes MIC/Music:Bass: 100Hz(±15dB) ;MID: 1KHz(±15dB); Treble: 10KHz(±15dB) Gross Weight: 3.5KG