Questions about Braun Pulse oximeter 1

After an initial good opinion, I had to dispose of the device after 1/2 year because it was defective. It switched on and then switched off again. Too bad.

Can this device also be used to detect and analyse cardiac arrhythmias?

Is it possible to read the collected data from the pulse oximeter and save it on the computer?

Can the device also be used for children?

Is this pulse oximeter suitable for small children's fingers?

What is the effective size of the device? The information on Galaxus refers to the packaging. Can anyone verify this information found on the internet? The dimensions of the oximeter are approx. 58 mm × 35 mm × 30 mm. The SpO2 measurement range is 70% - 100%.

Very good and easy to use.

Does the knife have an alarm function?