Product parameters: Screen size: 1.8 inch Built-in chip: Realtek 8762DT Screen type: round Frame Material: Stainless Steel Waterproof level: iP68 life waterproof Charging type: Magnetic charging Char more→ging time: 3-4 hours APP: Da Fit Brand name: SACOSDING Compatible mobile phones: Android 6.0 and above, IOS 9.0 and above. Features: Bluetooth call, Heart rate, Blood pressure, Blood oxygen, Sleep, 100+sport modes, Step counting, Weather, Camera control, Music control, Stopwatch, Alarm clock, Timer, Sedentary reminder, Breathing training, Messaging, Mute. Information push: Phone, SMS, wechat, QQ, Facebook, twitter, instagram, Skype, WhatsApp, line, kakao talk, others (push the information