Features: 1.06 inch OLED Screen, 128 * 128 Pixel. Built-in 95mAh battery, working time is about 5-7days. Support iOS 7.1 version above and Android 4.4 version above. IP67 waterproof and dustproof, you can wear it to rain, wash hands and take a bath, but don’t put it into hot water. Fitness Tracker, it can easily measure your heart rate at the wrist. Make every beat count and let the heart rate be your health guide. Support sport pedometer, heart rate monitor, sleep quality monitor, music playing control, calls message alert, Breathe Training, time/date/weekday display, clock alarms, Remote Camera, Weather Forecast and Stopwatch etc. Language: Chinese, English, Japanese, Spanish, Portuguese, French, Russian, German.