Multitip Design:Unique to Defunc the Multitip design was formed first and foremost for a secure fit. However with a secure fit comes a better delivery of sound to the ear. So unlike an earbud design the Defunc can deliver more punch.|Playtime:3.5-4.5 hours on a single charge. When combining the charge case there is a total of 22 hours.|Microphone:Two high-quality microphones are used to ensure calls are clear.|Water Resistance:IPX4 rating. So being caught in the rain while running is not a problem.|