View this product description in Norwegian.

The Palmer Duetto-Box is a 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.
The Duetto allows you to actively mix two sources together to one output, which can in turn be connected to an amplifier. Each input has a volume pot so that the levels can be adjusted. Especially guitar teachers who would like to play together with their student over one amp will value the Duetto. But the DUETTO has a wide range of applications, it can be used as a cable driver, a monomerger or as a recording preamp.
The Duetto's very low power consumption allows the unit to be powered by battery over many hours. However the box also offers a DC power socket where you can connect a standard 9V power adaptor.
Specifications:
    * Inputs: 2 x unbalanced 6,3 mm jack
    * Input impedance: 1 M Ohm
    * Max. Input Level: 1,55 V (+6 dBu)
    * Output: 1 x unbalanced 6,3 mm jack
    * Output impedance: 10 k Ohm
    * Amplification: max. x 2 (6 dB)
    * Power Supply: 9 V (Art. Nr.: PW9V)