The tube audio is the tube clock´s companion; a portable bluetooth speaker with the best components available resulting in an extraordinarily good sound given its size, and has a music playtime of at least 12 hours! Features Tube Collection Designed in 2014 Bluetooth or AUX connections Bluetooth connection up to 24 feet 100dB Maximum volume 12 hours of Play time Lithium-Polymer battery Chargeable through USB Available in Steel or Matt Black color