SPLASH AND SWEAT RESISTANT - IPX4 splash and sweat resistant for intense training 8 HOURS OF BATTERY LIFE - 250 Hours standby time 8 hours play/call time BUILT-IN EARHOOKS Achieve a more comfortable secure fit INLINE CONTROLS AND MIC Easily adjust volume and playback, built-in microphone BLUETOOTH 4.1 aptX Highest quality wireless connection and playback available with aptX codec