Battery life of 6 hours after 1.5 hours of charging. The CX SPORT is ready to work out when you are with an extra hour of battery life after a simple 10 minute charge. German-designed and -engineered Sennheiser unique transducers provide balanced, clear sound with dramatic bass capabilities. Three sizes of ear fins (S, M, L) and four sizes of ear adapters (XS, S, M, L) allow for a customized fit for the best passive noise reduction and wearing comfort. PROS🟢 Can connect to Android devices and Apple gadgets, max capacity is 8 devices simultaneously Good for answer calls and listening to music CONS🔴 Not too sensitive while running