CSM Compact Mixers With USB / Bluetooth Compact format audio mixer with 2, 4 or 6 mono input channels and a stereo line input. Each mono channel has a combo XLR/jack input with individually switchable mic/instrument impedance and +48V phantom power for the XLR. Input channels have High/Low EQ and Pan controls and mono channels also have Effects level to vary the amount of internal digital delay effect added for vocals or instruments. An internal player/recorder with backlit display can accept a USB memory stick containing compressed audio files in various formats or alternatively connect to a smart phone via BT wireless link. Output is delivered on a pair of balanced XLR connectors and offers very low noise operation for high quality studio or live performances. Integral USB multi-format audio player BT wireless connectivity Digital delay effect for vocals or instruments Individually switchable +48V phantom power Built in record function Supplied with DC power adaptor Power supply5Vdc 1A (adaptor included) Phantom power+48V individually switchable (XLR inputs only) Audio sourceInternal USB player/recorder & BT receiver Audio formatUSB playback mp3, wma, ape, flac / record mp3 (48kHz 128kB/s) Power consumption max.5W Gain-14 to +40dB EQ: low±15dB @ 80Hz EQ: high±15dB @ 12kHz Input impedance : mic2k Ohms Input impedance : instrument1M Ohms Input impedance : line20k Ohms Bluetooth version2.1 + EDR Frequency response20Hz - 20kHz (±0.5B) THD +N