3 Accurately records all-day activities like steps, distance, calories burned and active minutes precise algorithm enables more scientific exercise A great sleep starts a productive day it trackers your sleep duration and consistency automatically with comprehensive analysis of sleep quality data so you can get a better routine Keep your phone out of sight and your goals in focus it syncs with your smartphone so you can see incoming call, text, and calendar notifications right on your wrist It resists sweat and splashes of water so you don't have to hold back on training when the weather is less than ideal Functions: Blood pressure meter, heart rate, blood oxygen, sleep monitoring, waterproof IP67, reminder SMS, incoming reminder, shake to photo, alarm clock, stopwatch, track motion, calories, multi-mode sports, time display. Size Screen: about 44 mm Case: Alloy Belt: TPU material USB charging method Color Band: Black, White, Pink 1.54 HD IPS screen main, 240 * 240