Radial Engineering 4Play, DI Box with Switching Function, Multi-output DI box, Fast switching between four outputs with just one footswitch, 4 XLR outputs for full control over 4 instruments, Prevents ground loops, Mute button for quiet cable changeover, Jack output for tuner, Robust construction - resistant on every stage, Power supply via 9 V DC power supply (negative polarity inside, not included in delivery - suitable power supply units: Art.#409939# or Art. #119603#)