Smart app syncs with fitness apps. Over 3 million happy global users. Easy setup app syncs with Samsung Health, Fitbit, Apple Health, and Google Fit, offers Apple Watch App. 13 essential measurements. Bodyweight shows on the scale. Other 12 data like body fat percentage, BMI, skeletal muscle, etc stores to app. You can weigh yourself anytime without your phone. The data will sync to the app once it is connected again. User-friendly app. Download RENPHO app at app store or google play. RENPHO App works with Bluetooth 4.0 And above. High Quality Product. Auto calibration, high precision sensors measure in increments of 0.2 lb, 0.05 kg with 396lbs, 180kg capacity. 4 high sensitive electrodes, 3 x AAA batteries included. FDA,CE,FCC,ROHS Certificated. Monitor your progress. RENPHO connects with the apps to help you set goals, save historical data and track your daily, weekly, and monthly progress. RENPHO brand is devoted and dedicated to the design, development and sales of digital scale.Specifications:Capacity: 396lb/180kg Division: 0.2lb/50gUnits: kg/lb(switch units through App)Features: Auto on/offMaterial: 5mm Tempered Glass PlatformDispaly: Backlit LED displayPower: 3*1.5V AAA batteries includedIndications: Low Battery & Overload IndicationUsing Tips: 1.If you are pregnant/pacemaker or other internal device holder, you should not over rely on the data provided by this product.2.For best accuracy, please lay the scale on hard and flat surface, and stand on the central area. Avoid carpet or soft surface.3.To avoid inaccurate weight results, please recalibrate the scale after physically moving or shifting it or when replacing the batteries.4.To calibrate, apply weight on the scale, then step off and wait for the LED screen to display ""0.0"". Then, step back on the scale to weigh with accurate results. 5.During weighing, the indication will be flashing on the display, wait till the indications stop flashing. Your weight will be displayed for about 15 seconds, then switch off automatically.6.Please stand on the scale with DRY & BARE feet and make sure your feet are touch 4 electrode areas on the surface of the scale before use when taking body fat and other data. And please also noted that you need to turn on the Bluetooth on your Phone and make a connection with the Bluetooth Scale via App (names RENPHO).7.Please change a new battery when ""LO"" appears on the screen which indicates that the battery is out of power. ""Err""showed on the LED indicates overload.RENPHO ensures 100% customer satisfaction with all purchases made from us, whenever you have any problem with our products, don't hesitate to contact us.