Altec Lansing MZX635 True Connect are Bluetooth earbuds that can be used for listening to music or making phone calls. They are designed to be water-resistant and sweat-proof, making them ideal for use during workouts or in inclement weather. The earbuds come with a charging case that provides up to 20 hours of additional playtime. The earbuds also feature a built-in microphone for hands-free calling, and they can be paired with two devices simultaneously.