Specifications Hign-concerned Chemical:None Waterproof Grade:3ATM Model Number:Men Women smart ring Display screen:No NFC Support:No Function:Message Reminder Activity Tracked:Activity Tracker,Steps Tracker,Distance Tracker,Calorie Tracker Metrics measured:Heart Rate Monitor,Blood Pressure Monitor,Sleep Monitor,Blood Oxygen Monitor Item Weight:10 Case Material:Alloy Certification:ce,DOT,FCC,EAC Brand Name:Ola Esporte Battery Capacity(mAh):155mAh For Smart Ring Multifunctional Rings Bluetooth Health Monitoring Sleep Monitor Heart Rate Waterproof Men Women Smart Ring Feature : 1. Premium Material: Made of high strength aluminum alloy, this smart ring is durable and elegant in design, ensuring long lasting usage. 2. Lightweight and Comfortable: With its lightweight and ultra thin body, this ola esporte smart ring provides a comfortable wearing experience. 3. Multifunctional: This ola esporte intelligent ring offers various functions, monitoring your heart rate, blood oxygen, sleep patterns, and step count. 4.The app offers dozens of sports, including GPS sports, indoor, outdoor, etc.Wearing a ring makes it easy to exercise,You can view and record your exercise data. 5. Ideal Gift: This ola esporte smart ring serves as a meaningful gift for any occasion or holiday, such as birthdays, anniversaries, Thanksgiving, Christmas, Hanukkah, or Valentine's Day. Product Parameters: CPU:FR8016HA. Bluetooth Version:BLE 5.0. Battery capacity:28mAh. Stanby Time:About 45days. Working Time:About 3-5days. Charing time:0.5H. G Sensor:msa310. Heart Rate Sensor:HX3605. Magnet Cable(With SMT Protect IC). Waterproof Level:IP67. Charging Requirement:Charging 1A or less. system requirements:android5.0+ / ios10.0+. Main Function: Heart rate measurement. Oximetry. Sleep monitoring. Step Count. Calories. Packing list: smart ring*1, charger*1, manual*1,Box*1 Size: 7#-17.2mm; 9#-19.0mm; 10#-20mm; 11#-20.6mm; 12#-21.5mm Note: There are two types of chargers for smart rings, one is a magnetic charging cable and the other is a charging box.