Feature:1. Premium Design: Made of premium aluminum alloy and ceramics, it is sturdy, durable, and elegant in appearance. IPX8 waterproof up to 100 meters, perfect for swimming, surfing, sailing, and deep sea diving.2. Comfy and Fashion: Lightweight design, ultra light body, lightweight wearing experience, so light that you may have more flexibility in various sports and movements.3. Various Functions: The smart ring has multiple functions, which can monitor your body temperature, sleep, steps, etc. at any time, allowing you to observe your physical health at any time.4. A Smart Ring: Equipped with a charging compartment, there is no need to worry about running out of power. Simply place the finger ring in the charging compartment for easy access. You can also control the phone's photo taking function, and with just one shake, you can take a successful photo. It supports Bluetooth distance of 58 meters.5. Great Present: This ring is a meaningful present, suitable for any occasion or holiday, such as birthday, anniversary, Thanksgiving, Christmas, Hanukkah or Valentine's Day.Specification:Item Type: Smart RingMaterial: Aluminum Alloy, Ceramic, Electronic ComponentsRing Battery Type: Lithium battery, shipped with built in battery. Ring Battery Capacity: 20mAhRing Battery Life: About 7 DaysRing Charging Time: 45 MinutesCharging Compartment Battery Type: Lithium battery, shipped with built in battery. Charging Compartment Battery Capacity: 350mAh.Package List:1 xSmart Ring1 x Charging Compartment1 x Charging Cable1 x User ManualNote:When using, the sensor should be tightly pressed against the skin to have the best effect.