Whynter BH-2100 - Manual (Page 4)

Press ▲ to enter the setting mode.
Press ▲ or ▼ key to choose the person numbers P0-P9, then press “SET” to confirm.
Press ▲ or ▼ to select male or female, then press “SET” to confirm.
Press ▲ or ▼to enter height, then press “SET” to confirm.
Press ▲ or ▼to enter age, then press “SET” to confirm
When “0.0” appears, step on the scale.
Your feet must stand evenly on the 4 electrodes as shown on the picture.
The weight is recorded.
When “0” is display, it indicates that the scale is analyzing. Do not step off the scale.