TC-Helicon BLENDER, Portable stereo mixer with USB audio interface, 6 Stereo inputs (3.5 mm TRS), 4 Stereo headphone outputs (3.5 mm TRS), Volume control and switchable compressor per input, Volume control and mute button per output, Talkback function via built-in microphone, Bluetooth 4.1 Connection to iOS and Android devices, USB-Mini-B port for computer connection, Power supply via external power supply (5V DC, 1 A) or 4 AA batteries (not included), Dimensions: 43 x 132 x 124 mm, Weight: 370 g