Smart Body Tape Measure comes with 1-year warranty. Our customer support team is dedicated to providing you with satisfactory solutions. [A Smart Tape Measure Know Your Body Fat] Using this body tape measure to record down your data on Fitdays App, it will calculate your body fat percentage! [App Tracks Your Waist-to-Hip Ratio ] Smart Body Measuring Tape pairs with Fitdays APP via Bluetooth. You can easily record down your data on app, it will record your measurements and visualize your waist-to-hip ratio process by graphing. Track the changes in your body composition, using waist-to-hip ratio to establish a clear picture of overall health. [App Helps You Find out Your Body Shape] Simply record your body data on Fitdays App,it helps you find out your body shape and know how to choose the garment that best suits us and highlights our body with its natural forms. [Accurate & Easy Read Type Measure ] Built in smart chip in the tape measure allows it get the measured data accurately and saving on APP instantly. If you face an issue of reading difficultly on a traditional measuring tool,this is the best body measuring tape for you! Large LCD displays your measured data accurately and clearly. [Multifunctional] Keep tracking of changes in your biceps, calves, hips, thighs, waist, shoulders, bust, neck and abdomen by Smart Body Measuring Tape, showing a more accurate picture of your total body transformation over time to you. Perfect for professional trainers,like muscle gaining, fitness enthusiast, slimming down group, even for an expecting mother-to-be. [Easy to USE] Designed with Retractable Easy-Lock Hook, you can use this body measuring tape to measure your body circumference quickly on your own. Press Power and M button at the same time to reset the tape measure and clear the display. You can use it to do a straight-line measurement or circumference measurement. Product Name:Smart Tape Measure Model:ER307UWB Unit:cm/in Size:7.8x7x2.8 cm Measuring Range:150cm/60in Resolution:1mm,1/16in Accuracy:+/-3mm,+/-3/32in Working Humidity:40%-85% Working Temperature:0°C-40°C/32°F-104°F Battery Capacity:300mAh 1.11Wh Input:5V-0.5A Rated Power:2.5W FCC Regulatory Compliance