・IP68 waterproof technology:IP68 waterproof performance allows you to rest assured that you are not afraid to wear it,shower,swim,or wash your hands ・Health smart ring:With sleep monitoring,blood oxygen,heart rate,blood pressure monitoring function ・Magnetic charging:The ring is equipped with a powerful magnetic suction coil,which can be charged by magnetic suction,making charging more efficient ・Record exercise data:Real time sync with your phone,accurately grasp your exercise data,and help you achieve daily goals Specifications: ・Size: ・Size 7 inner diameter:17.3mm,finger circumference:54.4mm ・Size 8 inner diameter:18.1mm,finger circumference:56.9mm ・Size 9 inner diameter:18.9mm,finger circumference:59.5mm ・Size 10 inner diameter:19.8mm,finger circumference:62.1mm ・Size 11 inner diameter:20.6mm,finger circumference:64.6mm ・Size 12 inner diameter:21.4mm,finger circumference:67.2mm ・Material:Outer surface material:stainless steel,main body material:epoxy resin ・Compatible system:Android 5.0 and above Hongmeng system is supported IOS 10.0 and above ・Storage capacity:It is recommended to connect to the app and sync data every day. The ring can store up to 15 days of data,depending on the type and frequency of use ・Battery capacity:20mAh ・Battery life:3 to 5 days,depending on the frequency of use ・Charging method:Use the included charging cable (USB rated 5V) ・Light sensor:LED is in visible color range,safe and user-friendly ・Connection method:Low-power Bluetooth-compatible 5.0 ・Product weight:about 5.0 grams ・Software program update ability:Updated via software application ・Waterproof level:IP68 ・Charging port:Magnetic charging with short circuit protection ・Charging time:about 30 minutes ・Main functions:Exercise monitoring,sleep monitoring,multiple exercise modes,heart rate monitoring,blood oxygen monitoring,blood pressure measurement and monitoring,remote care ・APP supports languages:Russian,Hungarian,Turkish,German,Italian,Czech,Slovak,Japanese,French,Polish,Persian,Simplified Chinese,Traditional Chinese,English,Portuguese,Spanish,Vietnamese,Arabic,Korean,Thai 20 languages Package included: ・1 x Smart Ring ・1 x Magnetic Charging Cable ・1 x English and Chinese User Manual