Compatible with the Fitdays+ APP: Connect Fitdays+ via Bluetooth to quickly measure 12 body parts including head, neck, shoulders, chest, arms, waist, hips,thighs and calves, body data at a glance, allowing you to easily track your body changes Easy to Read Data: Body tape measure is equipped with an LED display, compared with the traditional tape measure, the data display is clearer and easier to read, making the measurement more convenient and accurate, is a must-have equipment for fitness Retractable Design&Easy to Use: Measuring tape for body with automatic retractable button, no need to retrieve the tape measure after measurement, easy lock hook design allows you to quickly complete the test without the need for others to help Rechargeable and Portable: 300 mAh battery, Type-C charging port, ultra-long usage hours, dual scale ruler, cm/inch units,length 60 in/150 cm mini measuring tape for body is easy to carry, make sure you can measure and track your body changes wherever you go Know Your Body Type: Using tape measure body measuring tape and the Fitdays+ app to record your body data and get an easy overview of your body shapeBased on this information, accurately choose the right clothing to naturally show off your body's strengths Wide Range of ApplicationsFitness enthusiasts, slimmer, a mom-to-be or a child who is growing taller and a girl who is developing during puberty,can use the Smart Tape Measure to keep track of the data of various parts of the body, support multi-user use