•【Smart Health Tracking】This intelligent ring monitors sleep patterns,blood oxygen levels,and heart rate,providing comprehensive health insights •【Durable and Waterproof】Crafted with stainless steel and featuring IP68 waterproof rating,this ring is built to withstand daily wear and water exposure •【Long Battery Life】With a 16mAh polymer pure cobalt battery,enjoy 3-4 days of normal use or up to 20 days on standby •【Bluetooth-compatible 5.1 Connectivity】Seamlessly sync your data with the Jring app,compatible with Android 9.0+ and iOS 10.0+ devices •【Quick display】Touch the side button to display time,steps,heart rate,blood oxygen,sleep,battery level and other data to remind you at all times Specifications: •Waterproof rate: IP68 •Material: Stainless steel+glue filling process •Size: • 8 (inner diameter 18.2mm) • 9 (inner diameter 19.0mm) • 10 (inner diameter 19.9mm) • 11 (inner diameter 20.7mm) • 12 (inner diameter 21.5mm) •Thickness: 2.5mm •Chipset: Dialog DA14585 •Memory (ROM+RAM): 128kb ROM+96 Kb RAM •G-Sensor: SC7A20 •Bluetooth-compatible Version: 5.1 •MobileAPP-GPS: Yes •Heart rate sensor: HX 3918 •Battery Type: Polymer pure cobalt battery •Battery Capacity: 16mAh •Operating temperature range: 0-50℃ •Charging time: 2 hours •Theory Standby time: 16 days-20 days •Normal using time: 3-4 days •Compability: Support Android 9.0 and above; for Apple IOS 10.0 and above •Compability Software: Jring •Multi-sport mode: Multiple sports modes Package included: •1 x Smart Ring •1 x Magnetic Charging Cable •1 x English User Manual