The Monoprice™ Smart Magnetic Bluetooth® Earphones are great sounding, lightweight earphones that are perfect for working out and everyday use. The "smart magnet" feature automatically turns the earphones on and puts them into Bluetooth pairing mode when they are separated and automatically turns them off when they are put together. The IPx4 rating makes them impervious to splashing water, so they are sweatproof while working out. A three button inline control allows you to easily change music tracks or answer calls with the push of a button. Your voice will sound crystal clear on calls thanks to Qualcomm® cVc™ 6.0 Echo Cancelling and Noise Suppression technology. The amazing battery life gives them up to 12 hours of audio playback on single charge.