Professional mixer 4/7 channels Bluetooth/USB/Stereo RCA inputs Model: F-7 4/7 channel mixer with two stereo channels and one separate stereo channel Built-in 48V phantom power for condenser microphones. Integrated effects processor PAD switch for mono type inputs "D-PRE" microphone preamplifiers with inverted darlington circuit XLR balanced outputs Metal body Dimensions Microphone input Frequency Response: 10Hz - 200kHz Range Gain: +14dB - +60dB SNR: 120dB E.I.N Line input Frequency Response: 10Hz - 130kHz Range Gain: -6dB - +38dB SNR: 95dB EIN stereo channels Frequency Response: 10Hz - 70kHz Range Gain: line -8 +15dB / microphones: +13 - +60dB SNR: line 90dB EIN / microphone: 104dB EIN equalization LOW: 50 Hz, +/- 15dB MID: 700 Hz, +/- 15dB HIGH: 10kHz, +/- 15dB Main mix Main output: +28dBu balanced / +22dBu unbalanced AUX: +22dBu unbalanced EFF: +22dBu unbalanced Tape out: +22dBu unbalanced Phone Output: +22dBu unbalanced Included in the package power supply Manual in English