Smart Body Tape Measure fou 71 men Ti © Unit em/in Button % LCD Accuracy 2a Resolution mm Adjust Tape Measuring Range | 1500mm Button B Receptacle Working Temperature | -0°C ~50°C Tape Working Humidity | 85% Locking Pin Battery CR2032 inl &@ Bluetooth save bunion < OST & On/ OF bunion @ Unit button Press and rotate the battery door anticlockwise. Battery door will be open. Insert the battery. Make sure the positive pole face up.