Description: Adopted Bluetooth 5.0 technology, it provides fast and stable pairing with any iOS and Android smart phones, tablets, laptops, MP3 players from up to 33 feet away. Built-in HD microphone offers crystal clear audio and natural sound, allowing you to enjoy high quality music and clear phone calls wherever. Easy-to-reach buttons, quick to answer the calls, play or stop the music, phone number report, voice alerts battery level, connection status, let you enjoy real hands-free. 180 degree rotatable earpiece fits perfectly for your left or right ear. Only 14g in weight, lightweight, it does not cause any burden to your ears, providing lasting wearing comfort. 20h music time, 25h call time, 250h standby time after a full charge, waterproof shell can protect internal components from liquids and earphones from sweat, and ensure a longer service life, perfect for running and exercising. Specification: Model: F900 Material: Plastic Electronic components Bluetooth Version: Bluetooth V5.0 Bluetooth Range: ≤10m Earpiece Battery Capacity: 170mAh Play Time: 20-25H Charge Time: 30-60 Minutes Weight: 14g Size Chart: 102x145x33mm/4.02x5.71x1.30inch Package Includes: 2 Set Bluetooth Earpiece (Black + Blue) Note: Please allow slightly 0-1cm difference due to manual measurement. Colors can appear different depending on light and how the listing is viewed. Thanks for your understanding and attention. Wish you a pleasant shopping experience!