1. Bone conduction technology (Not In-Ear type) 2. Do not hurt your ears! 3. Healthier: Prevent bacteria inside your ears 4. Safer driving: Do not block sound when making phone calls / listening to music 5. Comfortable wearing 6. Size adjustable: Suitable for different head sizes 7. With CVC noise reduction function, can connect to Bluetooth from mobile, laptops and other audio equipment 8. After pairing to PC Bluetooth donggle, it can play all kinds of audio, MP3, live chat on qq, MSN, Skype 9. Applied for hiking, running, climbing, biking, driving