Material	Body: 304 stainless   steel, IP plating   Inner ring: resin grouting
Color	Ring: Silver/Space   Black/Gold   Power Charger: Black or White
Waterproof	5 ATM
LCD display	0.7 "LED segmented display
Smart function	Remote shutter,   music/video control,   touch once to display the current time,   touch twice to start measuring steps,   touch 3 times to measure heart rate,   touch 4 times to measure blood oxygen,   touch 5 times to enter sleep mode,   touch 6 times to display battery level
Health	Automatic sleep tracking, activity, heart rate, blood oxygen,   HRV stress, mood, fatigue levels
Sports	5 exercise modes   (walking, running, cycling, rock climbing, golf) to record and view your   exercise data including steps, distance, calorie, heart rate, pace and more.
Battery	Battery Size: 15mAH, Charger: Charging Cable,   Charging Time: 1H, Normal Use: Up to 4 Days,   Standby Time: Up to 15 Days
Apps &   Compatibility	ZDFIT   Android 8.0+ / iOS 12+
Product size	Ring width: 8 mm   Available sizes:   Size #8 (diameter 18.0 mm)   Size #9 (diameter 18.8 mm)   Size #10 (diameter 19.7 mm)   Size #11 (diameter 20.5 mm)   Size #12 (diameter 21.3 mm)   Size #13 (diameter 22.1 mm)
Weight	2.9g