Lightweight and comfortable bone conduction headphones with an open-air design. - Color: Blue - Type: Bone conduction headphones - Design: Open-air design - Features: Lightweight and comfortable fit - Usage: Perfect for sports and outdoor activities Thank you for viewing. I purchased these, but they didn't suit me as I prefer wireless earbuds. I've used them a few times and then stored them. Since they haven't been used much, the battery life should be good, but please understand that these are used items. I hope to sell them to someone who understands this. Please feel free to comment if you would like me to add more photos.