Feature:1. MULTIPLE FUNCTIONS: The smart ring has multiple functions to monitor your sleep, body temperature and all sports health data at any time, allowing you to keep an eye on your physical condition.2. LIGHTWEIGHT DESIGN: Designed with an ultra lightweight body, there is no feeling of wearing it. So light to wear that you may forget it's there.3. FITNESS SLEEP MONITORING RING: Records your pace throughout the day, and at the same time it detects your sleep time and sleep status, from which you can find out how well you are sleeping.4. MATERIALS, CONVENIENT CHARGING: Made of aluminium alloy and ceramic, not only durable, but also beautiful. With charging compartment, you can charge it anytime and anywhere, easy to carry it around5. IDEAL GIFT: You can give it to your friends and family on birthdays, anniversaries, Thanksgiving, Christmas, Easter or Valentine's Day. It is a very meaningful gift.Specification:Item Type: Smart RingMaterial: Aluminium, Ceramics, Electronics, ABSRing Battery Type: Lithium Battery (Built In)Ring Battery Capacity: 23mahRing Battery Life: About 3-5 DaysCharging Compartment Battery Type: Lithium Battery (Built In)Charging Compartment Battery Capacity: 300mah.Package List:1 xSmart Ring1 x Charging Compartment 1 x Charging Cable1 x Lanyard1 x Instruction ManualNote:Note that the BT distance is about ten metres, please do not be too far away from your phone's BT.