Shokz TREKZ AIR Bluetooth Bone Conduction Headphones, Midnight Blue AFT-EP-000007 No feeling of pressure or stuffiness, and your ears don't get sweaty. Because they don't cover your ears, you can hear ambient sounds even when using them for exercise like jogging, and you can notice the approach of cars and pedestrians. Titanium band with excellent flexibility and durability The headband uses titanium, which has passed durability tests of over 100,000 times, providing excellent flexibility and durability for repeated use. With its unique PremiumPitch+ technology, these bone conduction headphones achieve high-quality sound with a wide dynamic range and rich bass, just like conventional headphones. IP55 sweat-resistant design. They are IP55 waterproof rated, so you can use them with confidence even if you sweat during exercise or are exposed to light rain. The built-in microphone allows you to make calls through your iPhone or smartphone, using phone or VoIP apps. The noise-canceling function allows for comfortable calls without worrying about surrounding noise. Two EQ presets, including a boost mode for enjoying deep bass Equipped with two EQ preset modes: an EQ preset that boosts bass and provides powerful sound with vibration, and an EQ preset for enjoying music quietly. You can change the EQ by simultaneously long-pressing the volume buttons (+/-) during music playback. Bluetooth 4.2 compatible for easy connection and use with multiple devices. Supports multi-point connection. When pairing and using with multiple devices, you can use this unit by operating only the device side, without having to perform troublesome pairing operations on the unit itself. Operational confirmation: Approximately 4 hours of use from a full charge with earplugs. The left side cover is cracked (due to deterioration and removal of the cover; battery capacity confirmed at 183mAh; similar parts are available online, soldering required). Please understand. Ideal for bone conduction beginners or those who want to disassemble and play with them. Selling due to the purchase of a higher-end model. Thank you for your consideration.