Product Description Color: Black, Red, Silver, Blue 1. Ear hook design: Not in the ear, free from damage to the eardrum. Instead of bone conduction headphones, there is no need to vibrate ear bones. This is more comfortable and very light, wears painlessly and does not irritate your ear. For prolonged use, the latest concept in ergonomics fits completely outside the ear cup. The left or right ear can be worn. 2. First use of the connection: Press the power button more than 5 seconds until the blue and red lights flash alternately. It works very well and connects easily the first time. Each time after that, it will connect automatically. 3. The bluetooth headset can also match with most bluetooth devices. You can enjoy music within 10 meters and the signal connection is stable. Compatible IOS, Android and WP system. As long as the devices have Bluetooth, it can be used. 4. Built-in high-capacity lithium 90mAh battery: 5-6 hours answering time, about 6 hours music playing time, 120-150 hours standby time, 1 up to 2 hours quick charge. The headphone battery status will be displayed automatically on the IOS cellphone screen. It helps you understand the current situation more quickly. 5. It is light and convenient to carry: you may hardly feel it. Sound is good. Can also hear music around. It fits well and comfortably, especially for someone who doesn't like things in their ears or crush them. 6. Waterproof and Sweatproof Design: New IPX5 waterproof structure effectively prevents rain and sweat from splashing on the headphones, and protects the headphones from damage.