Feature: 1. MATERIAL: Made of stainless steel, sturdy and durable, beautiful and elegant. The ring with charging compartment is convenient to charge, no need to worry about running out of power even when you are travelling outside, and at the same time, it is easy to store. 2. PORTABLE LIGHTWEIGHT: Ultra lightweight body (ring is only about 5g), no wearing sensation, light wearing experience, so light that you may forget it's there! 3. HEALTH DATA MONITORING: It can monitor your body temperature and many other physical health data at any time, so you can keep an eye on your health. 4. SPORT AND SLEEP DETECTION: It can also be an exercise ring as it can keep track of all your steps throughout the day. Besides that, when you are in sleeping state, it can record your sleeping time and sleeping state, letting you know how your sleeping quality is. 5. IDEAL GIFT: This ring is a meaningful gift suitable for any occasion or holiday, such as birthday, anniversary, Thanksgiving, Christmas, or Valentine's Day. Specification: Item Type: Smart Ring Material: Stainless Steel, Electronic Components, ABS Weight: Approx. 109g / 3.8oz Ring Battery Type: Lithium Battery (Built In) Ring Battery Capacity: 18mah Ring Battery Life: About 3-5 Days Ring Charging Time: 60 Minutes Charging Compartment Battery Type: Lithium Battery (Built In) Charging Compartment Battery Capacity: 300mah Color: Purple. Package List: 1 x Smart Ring1 x Charging Compartment1 x Charging Cable1 x Instruction Manual