It would fit into your pocket. Operation is simple. Once you have inserted the batteries with plus to the right, off you go. The tuner is also precise enough that to make an adequate atmosphere. However, only once in this my device in front of me. The audio input so goodbye after half a minute already from the living (no off / on, Anders-keeping etc. helped). So I'll send it back. But a little more about the properties: english manual / Chinese - the Eno Music Co. of Qianhai, Shenzhen, a pseudo-CE mark has printed on the packaging (schmunzel). The supplied two AAA batteries functioned even three presets (Guitar, Bass, Chromatic at 1Hz adjustable), input and output there would be also for electrical appliances. Energy saving, the device switches off automatically after a short time. A Kläppchen back can also easily and stably stand upright. All well and good, but the main function appears just not to work, so Exchange.
In mid-December came to the second delivery. Nachzutragen: The device is easy to work, would have to be adjusted more sharply for my taste in the ad but. Two each allegedly provoking strings can then persisted clearly heard past each swing (~ quarter tone)! Many stop repeats of the LCD pointer then swings out yet. Two stars only because of the low price. Addendum: Meanwhile, almost exactly two years after the tone detection to stop working, so electronic waste. Depreciation ie on a star.