Adastra MM321 Rack Mixer BT/USB/FM 953.028UK Rack-mountable 1U mixer with built-in media player and Bluetooth receiver. 3 mono inputs connect via XLR microphone or line input (switchable). Each of these inputs has switchable +20V phantom power for use with condenser microphones or D.I. boxes and channel 1 has a variable priority function. Two stereo auxiliary line inputs are provided on RCA connectors with a stereo record output. Media player operating modes include 3.5mm Aux input, USB audio player, FM radio tuner and Bluetooth receiver for playback from a smart phone or tablet. Main left and right outputs are fed to XLR with an additional mono summed output on 6.3 jack. Versatile yet easy to use as a main mixer for background music, public address and house PA systems. Built-in Bluetooth receiver Media player with USB playback and FM tuner Switchable +20V phantom power Variable priority muting for channel 1 24V emergency mute contacts The box for this item contains: MM321 1U mixer with Bluetooth + USB/FM player IEC power lead(s) Power supply: 100-240Vac, 50/60Hz (IEC)Fuse: T1ALInputs: mic/line3 x XLR (bal/unbal)Inputs: aux2 x L+R RCAInput: line3.5mm jack to media playerAudio source: Internal Bluetooth, USB & FM playerOutputs: L+R XLR, Mono 6.3mm jack, Record out (RCA)Emergency control: 24V contacts mute all except channel 1Phantom power: +20V (switchable channels 1-3)Controls: Media, 3 x Mic/Line, 2 x Aux, Treble, Bass, Master levelRear panel controls: Priority muting level, mic/line and phantom DIP switchesInput impedance: 2.2k Ohms (mic/line), 10k Ohms (aux)Frequency response: mic20Hz - 18kHzFrequency response: line14Hz - 20kHzFrequency response: aux10Hz - 23kHzInput sensitivity: mic/line-45dBVInput sensitivity: aux/line-10dBVSignal to noise ratio: mic55dBSignal to noise ratio: aux/line60dBTHD: 0.05%Dimensions: 482 x 130 x 44mmWeight: 1.43kg