["ALL-DAY OPEN-EAR COMFORT: Crank bone headphones allow you to enjoy high quality music with ultimate ear comfort. Vibrations deliver sound through cheekbones to inner ears bypassing eardrums and reducing the risk of hearing damage and the Premium Silicone Coating ensures a soft touch . These sound like the best bone conduction headphones if youre looking for greater comfort for extended listening and enhanced situational awareness for safety during all your activities." IPX7 WATERPROOF RESISTANT: Ideal for all sports enthusiasts Crank bone conduction headphones with a mic withstand heavy rain and sweat allowing you to chase any environment. They can handle submersion in water up to 1 meter for 30 minutes. For those seeking headphones ideal for swimming explore our Crank Swim model specifically designed for extended swimming sessions. STAY CONNECTED EVERYWHERE: With the open ear headphones wireless Bluetooth 5.4 expect nothing less than crystal clear audio up to 10 meters. The multi-device connectivity allows for simultaneous connections to multiple devices for ultimate flexibility and ffortlessly control your audio make hands-free calls and access Siri/Google Voice Assistants. The MP3 player carry over 2500 songs perfect for phone-free workouts.Store Up to 145 hs of music or podcasts. The Crank headphones will be fully charged within 2 hours (10 min for 1 hs of playback). With up to 12 hs of playtime and up to 15 hs of talk time you can listen all day your tunes without run out of battery. "MAGNETIC CHARGE FOR ALL DAY PLAYTIME: Quick charging with magnetic connection reduces wear on charging ports. The magnetic charging connector will align with the charging ports polarity automatically the wireless bone conduction headphones will be fully charged within 2 hours (10 min for 1 hour of playback). With up to 12 Hours of playtime and up to 15 Hours of talk time you can listen all day your tunes without run out of battery." PREMIUM LIGHTWEIGHT CONSTRUCTION: The Crank bluetooth bone conduction headphones feature a premium titanium alloy frame coated with a patented premium silicone-wrapped finish what makes them exceptionally strong and resistent. Despite their impressive strength titanium alloys are incredibly lightweight.The silicone finish offers a soft touch on the cheekbones minimizing pressure this translates to significantly improved comfort during extended use and hygiene especially during workouts or in humid conditions.]