Feature: 1. Beautiful And Sturdy: Smart health ring is made of premium aluminum alloy and ceramic, sturdy and reliable, beautiful and elegant. With its lightweight design, you may forget it's there. 2. Multi Function: Health tracker ring has multiple functions, body temperature, sleep, step recording, etc. It detects your sleep time and status, allowing you to observe your health at any time. 3. Pedometer Function: This smart ring health tracker can also be a sports ring, because it can record all your steps in a day. You can also wear it to follow the beat of our fitness trainer's movements. 4. Rechargeable: Fitness tracker ring built in 20mAh battery with 300mAh charging compartment and charging cable, you don't need to worry about charging when you are outdoor. 5. Gift Choice: This smart ring is a meaningful gift, suitable for any scene or holiday, such as birthday, anniversary, Thanksgiving, Christmas or Valentine's Day. Give your family or friends a surprise. Specification: Item Type: Smart Health Ring Material: Aluminum Alloy, Ceramic, Electronic Components, ABS Ring Battery Type: Lithium Battery (Shipped with Built in Battery) Ring Battery Capacity: 20mAh Ring Battery Life: 3 to 5 Days Charging Case Battery Type: Lithium Battery (Shipped with Built in Battery) Charging Case Battery Capacity: 300mAh. Package List: 1 x Smart Health Ring1 x Charging Case1 x Instruction Manual 1 x Charging Cable Note: Manual measurement, please allow some errors.