Seca 664 Mode D'emploi Et Garantie page 85

Switching off the scale
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4. Press and hold the Enter key (send/print) of the
scale.
The measured value is sent to the wireless printer.
BMI is calculated.
Height, weight and BMI are printed out.
Press the Start key.
NOTE
In rechargeable battery operation, the scale
switches off automatically after a short time if
there is no load on it.