Small size, especially suitable for small ear, hidden in the ear and hair. One Button Control, easy to use Use in single or in Pair IPX Waterproof sweat proof Compatible with all mobile phones True wireless Bluetooth-compatible Headset,Ideal companion for stylish looks and pure sound ,smart portable devices. Slide To Open With One Finger,Exquisite appearance, fashionable and simple, easy to operate. Easy To Use Button Control,Both earbuds has been equipped with multifunctional button. One button can help you use various functions. Comfortable And will not Slip Out,Intimate ergonomic design, close to ear, triangular stable support, intense fitness to the ears..syi