This is an in-ear true wireless Bluetooth earphone, compact and easy to carry. There are two color matching designs, pearl white and starry black. These two colors look very delicate, ergonomically designed, stable to wear and not easy to fall off. The sound quality is clear and the battery life is strong. The stable transmission characteristics of 5.1 and the in-ear earphone design allow you to exercise freely and without fear of the challenges of harsh fitness environments. Whether you are lifting irons, jogging at night, or participating in a city marathon, stable and uninterrupted music makes exercise more Plenty of power.