AfterShokz Bluez 2 is a bone conduction Bluetooth, open ear, headphone set with superior sound quality, designed ergonomically with a balanced and slim structure. The headphones wrap around the user’s head and have transducers that rest comfortably in front of the ears. Unlike conventional headphones nesting inside the ear canals or covering the ears, AfterShokz Bluez 2 uses a perfected, proprietary bone conduction technology to deliver sound through the cheekbones to the inner ears, keeping both ears completely open every step of the way. Bluez 2 are the best choice for anyone wanting to maintain environmental awareness and long-term comfort while plugged in to music or listening to a phone call via bluetooth.