Features: High quality aluminum height measurement rod and provide frexible adjustable points for easy to use it Power supply adapter ( TYPE C connector) With lithium battery Built in RS-232 output for printer and link to computer  Additional output for Bluetooth ( optional) Sleep mode and auto power-off function to save energy LCD display brightness can be adjusted by keys Measurement height, body weight and BMI calculation Hold function automatically or manually Up to 200 memories preset PLU numbers, easy to use it On/off button,short press to turn on and long press to turn off; In BMI mode, press the button to decrease the height value Weighing mode, used for tare or zero weighing mode can select HOLD mode and BMI mode weighing mode, units is selectable ; Long press and hold for BMI mode to increase the value, and short press to decrease the value BMI mode, press the PLU key for height values; Long press is faster to increase the value, short press is slow to increase the value weighing mode, BMI can select to body height values for BMI function mode