Meet Openfit 2, the Shokz DualBoost composite drivers and OpenBass 2.0 algorithm pair crystal-clear mids and highs with a deeper, richer bass for an exceptionally detailed sound. This featherlight 9.4g earhooks integrate a Ni-Ti alloy that contours to your ears for a personalized fit. IP55 rated water resistance ensures performance in any condition. With Open-Ear awareness – Stay connected to your surroundings with Shokz open-ear design and to your phone calls with dual noise cancelling mics. Enjoy up to 11 hours on a single charge , 48 hours with the charging case and a quick 10minute charge for the extra 2 hours of listening to move you through your workout. With the new added Multifunction buttons – you can adjust volume, skip tracks, take calls and switch between 2 paired devices with a press of the physical buttons. Customize these controls , your EQ modes and more with the Shokz App.