Mi Bluetooth Headset Wireless Earpiece Hands Free Earphones with Mic & Charging Dock Black for Cell Phones (US Version with Warranty);

3 different earbud sizes
the soft, silicone earbuds come in 3 different sizes for a tight seal and comfortable fit.
high quality speakers
to optimize sound quality for calls and music, we kept the speaker output structure at a narrow 3mm, so that detail in the mid and high frequencies are preserved and noise is significantly reduced.the CSR8610 chipset supports Bluetooth 4.1, which reduce 4G network interferences, improving device compatibility, stability, and functionality across the board.
charging dock
the included charging dock can fully charge the headset to full about 3 times. The charging dock itself includes a 320mAh battery and boasts a standby time of approximately 90 days.
nano-coating technology
durable and oil-resistant whether it's in your ear, hands, pocket, or bag, Nano-coating technology provides oil resistance and reduces wear and tear. To clean the headset, simply give it a wipe.