Super-high performance Bluetooth speaker; waterproof & sand proof, that fits in your jeans pocket - minus all the stuff you don't need. The grab-and-go size of M proved to be by far our most popular, so for our next and most ambitious development to date, we decided to explore how far we could take the acoustics in the M size. The result is Super-M. 4 full-range, high-performance neodymium drivers are tightly packed on both sides of the Super-M, with each pair complemented by a passive radiator, totalling 6 drivers. These are driven by highly efficient amplifiers and a powerful Lithium-ion battery. A state-of-the-art Bluetooth 4.0 chipset ensures the best signal and efficient battery use. This innovative and unconventional set-up means Super-M can pump out incredible, 360º sound and keep the party going for 8-hours straight, all from a package that fits in your jeans pocket. The final step was sealing the whole package for IPX-5 waterproof rating and sand-proof so the Super-M can be taken anywhere.