• SR300 automatically measures the Mental Stress Index at regular intervals, supports continuous monitoring throughout the day, with early perception of emotional status and prompt adjustment
• Long periods of high mental intensity can cause damage and emotional exhaustion to the nervous and immune systems. Wearing the SR300 can be achieved through the calculation method of a dynamic heart rate sensor, which measures pressure values through heart rate measurement. The APP records and follows all measurement data for reference
• When under high pressure, reminders will be given, and the wearer can timely relieve and adjust their emotions based on the measurement values
• With a charging case for wireless charging. Easy to carry when going out, can independently charge the ring twice
• IP68 waterproof grade, the ring can act as a health monitoring assistant freely in daily life

Specifications:

• Perimeter: Size 17: 53.4mm, Size 20: 62.8mm, Size 22: 69mm
• System requirements: Android5.0+ /iOS9.0+
• Main control chip: FR8016HA
• Bracelet memory: 512kb
• Bluetooth version: 5.0
• Heart rate sensor: HX3605
• Temperature sensor: NST112c
• Battery capacity: 28mAh
• Working standby: about 3~5 days
• Charging method: wireless charging (including charging case 320mAh)
• Waterproof level: IP68
• Gravity sensor: msa310
• Bluetooth distance: 3~5 meters
• APP: for Google: JSRings, IOS: JSRing
• APP view:
• Heart rate measurement: support
• Blood oxygen measurement: support
• Blood pressure measurement (algorithm): support
• Multi-dimensional sleep monitoring: support
• Pedometer: support
• Calories: support
• Temperature measurement (skin temperature measurement): support
• Emotional stress test: support
• APP supported languages: English (default), Arabic, Czech, Danish, German, Spanish, Persian, French, Italian, Japanese, Dutch, Portuguese, Romanian, Russian, Turkish, Simplified Chinese