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Why is the laser not always emitting?

· FAQ - Ruler

Why is the laser not always emitting?

The laser is not always emitting, becasue...

1. to save the battery power.

2. to avoid unexpected eye exposure for safety.

It will turn on only when either one of the followings:

1. One of the measurement type is chosen.

2. One of the calibration type is chosen.

3. Laser pointer is chosen, then press and hold.

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