An MP3 / radio player of a different kind. An old Xperia mini smartphone was installed as a control. As amplification a 2 x 10 watt stereo amplifier. At the push of a button, this device rotates 180 ° around the back-mounted smartphone to operate. The analog voltmeter was converted as a VU meter and shows the beat of the music. With inserted SIM card. you can use this apparatus as a telephone. This device was already presented on many pages. Also on Instructables it is to be found. It is still a favorite object of mine today.