Kw20 ultra 2 comes with 5 pairs of straps and a carrier bag features including; multi-language,data, sleep, camera, sports mode, 6 ul modes; do not disturb mode; world time, stopwatch, sedentary reminder, battery saving mode, language assistant, blood oxygen, blood pressure, automatic heart rate measurement bluetooth communication, timer, calculator, alarm clock,calendar, gps, bluetooth music, find devices, temperature, games(dumb bird flying first), weather, blood sugar. app ferefit compatible system android 5.0 or above ios 9.0 or above memory 128mb screen size actual 2.1" pixel ips 368*425 touch type full touch screen вт 3.0/5.0 battery type li-polymer battery charging method wireless charger waterproof grade ip67 waterproof charging time 2-3h battery life 3-4days material zinc.