Developed in Singapore, the X-mini Max II is expertly designed to be ultra portable and precisely engineered to deliver a superior sound. With a simple twist and lift, the avant garde capsule-shaped design reveals a pair of stereo speakers. These stylish speakers, which can also be used individually, pop open the patented accordion like bass xpansion system (BXS) which successfully mimics the resonance of a sub woofer Defying the conventional notion that size does matter, the X-mini Max 2 is a pocket sized boombox. Its new 40mm driver, expanded BXS, extended playback time and modular "buddy-jack" design, enables it to effectively generate high quality and extensive aural ranges, be it the rich timbres of a soprano or the pulsating electronic beats of the latest dance track. New to the design aesthetics of the X-mini max 2 is the open and angled drivers for a directional audio enhancement as well as a richer bass output. Promoting communal usage with friends who have any second generation x-mini speakers is the "buddy jack" function that enables you to connect one x-mini to another, capable of forming an almost endless "daisy chain" of self powered, bass enhanced portable speaker system. X-mini II Features: Model: Xmini max 2 Dimension (LxWxH) : 65.8mm x 53.4 mm (closed resonator) Net weight: 178g Speaker: magnetism Prevent D40 H20mm Loudspeaker Output: 2.5w x2 Frequency response: 200hz-18k hz Signal to noise: 80db Distortion: -1% Play backtime: up to 12 hours Battery voltage/capacity: 400 mah Battery charging voltage: 5v/+0.5v Battery charge time: 5v input - 2.5 hours About X-mini: Winner of the prestigious red dot design awards (Germany) and the infocomm Singapore awards, which is the top innovation award in Singapore. The x-mini capsule speaker is revolutionary in the world of portable audio technology, striking the perfect balance of pocketsize Portability and uncompromising sound quality. The x-mini has a patented extendable vacuum that mimics the resonance of a sub-woofer (bass Xpansion System or BXS) capable of producing explosive volume and bass over ten times its physical size.