Bluetooth speaker tube for Kebidu Radio/Bluetooth/MP3 module

This is a simple remix of the original Bluetooth speaker tube, made for fitting the Kebidu Radio/Bluetooth/MP3 module. Since the output of the module is not amplified, I realized a very simple stereo amplifier, which is fitted inside the tube. The power supply is given by two 18650 Li-ion batteries in series (about 8 V, needed for powering the Kebidu module).