ELECOM Wireless Waterproof Hands-Free Headset HS50WP White microUSB cable (for charging) Operation confirmed Ideal for use in harsh environments, resistant to rain and sweat. This waterproof hands-free headset supports the IPX5 waterproof standard, allowing you to use it without worrying about rain or sweat during outdoor work. The ear pieces have ear arms that fit into the ear's recess to prevent them from falling out. (Right, left compatible) For one ear. I used to wear it when riding a road bike or running. Thank you for viewing.