•[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 9.0and and iOS 10.0and 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 and 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 (ROMandRAM): 128kb ROM and 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