Feature: 1. LIGHTWEIGHT AND STURDY: Smart ring is made of aluminum alloy and ceramic, sturdy, beautiful, elegant and lightweight design, ultra light body, thin wearing experience. 2. RICH FUNCTIONS: Smart ring has a variety of functions, such as body temperature detection, sleep monitoring, pedometer, etc., so that you can observe your health at any time. 3. MOTION SENSING GAME AND CHARGING CASE: Built in motion sensing sport game, just wear the ring and follow the movement beat of our fitness instructor. Comes with 400mah charging case, you do not need to worry about charging problems when outdoors 4. SLEEP MONITORING: This health ring can detect your sleep time, sleep status, to tell you how good your sleep quality is, 24 hours of sleep will be monitored. 5. MEANINGFUL GIFT: This smart ring is a meaningful gift to any occasion or holiday such as birthday, anniversary, Thanksgiving, Christmas, Hanukkah or Valentine's Day. Specification: Item Type: Smart 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: 3-5 days Charging Case Battery Type: Lithium battery (shipped with built-in battery) Charging Case Battery Capacity: 400mAh. Package List: 1 x Smart Ring 1 x Charging Case 1 x Charging Cable 1 x User Manual