Palmer Duetto, small format mixer, the inputs are specifically configured for electric guitars in terms of level and impedance., the box of course also works well with normal line signals, allows you to actively mix two sources together to one output, which can in turn be connected to an amplifier, inputs: 2 x unbalanced 6,3 mm jack, input impedance: 1 M ohms , max. input lLevel: 1,55 V (+6 dBu) , output: 1 x unbalanced 6,3 mm jack, output impedance: 10 k ohms , amplification: max. x 2 (6 dB) , power by 9V battery (# 132579) or external 9V power supply (# 108096) (both optional)