CZARTECH Acoustics CW530BT Bluetooth Earphones (Wireless Neckband Headphones) - Noise cancellation Mic for clear calls - IPX4 Sweatproof Earphone for Running / Jogging. Wireless Bluetooth Headphones / Bluetooth Wireless Earphone offer Balance sound signature with Clear audio tones and enhanced bass response. Its HD sound makes for an incredible listening experience with high clarity, powerful & rich sound for music and crystal-clear voice calls. Lightweight material body allows you to wear more comfortable .