Koss Headphones KSC35WL Bluetooth In-ear Microphone Black Wireless

6+ Hour Battery Life; Built-in rechargeable lithium-ion battery; In-Line Microphone & Remote (Play/Pause, Start/Stop, Volume, Answer/End, etc.); Clip comfortably over ears with pivoting ear plates; Open hear-through sound allows listeners to stay connected to surroundings; Oxygen-free copper voice coils improve signal transmission and conduction for cleaner, clearer sound; Computer-optimized neodymium iron boron magnet structures deliver great sound quality and volume; Protective carrying case included