USB Spring Speaker
...speaker, which is designed like a spring. The USB Spring Speaker connects to music sources via a 3.5mm audio input cable and charges via USB. Its battery offers four hours of playback time on a single charge. The speaker provides a maximum power output of 2W x2, and a built-in Li-ion rechargeable battery. Measuring 51.5 cm x 25.8 cm x 63.8...

