Connectivity: USB, Optional Bluetooth®. Display: 1-1/2 Inch / 38 mm High-Contrast Color TFT-Digital LCD Display Screen. Functions: LB / KG Conversion, LB / KG Lock Out, Body Mass Index (BMI), Zero, Tare, Hold / Release, Reweigh, Auto Zero, Auto Off. Time/Date, Variable Auto Off Time, Audible/Mute Sound Option. AC Adapter / Battery Operated. 2 Year Limited Warranty - Eligible for ScaleSurance Extended Warranty. Everlock™: Option that allows users to permanently lock the scale in either LB or KG to improve safety.