Recording only device and subsequent analysis on the computer are possible

Unlike described by the distribution company Pulox.de, it is possible!
Anticipation, the device is identical to the Contec CMS 50D + (PLUS also wrote). (The plus is important!)
Anyone looking for information about the device in English, so find a good deal on the internet.

You can take the unit (without PC) up to 24 hrs. At a time record.
The recording can be followed on the PC (not Apple compatible) read and evaluate the mitgeleiferten software.

However, the BDA is puny for the device (German), for the software is not doing BDA.
Overall, the operation of the device is a bit strange intuitive to learn through the single-button operation, but through trial and error. (Rather nothing for seniors)

The English BDA is better: [...]

For the PC connection and the PC analysis requires a manual!
These can be found in English at: [...]
and: [...]
(INSTRUCTIONS describes how to connect the device to your computer and is very important)

TIP: For the machine does not slip out at night, I still put a rubber band to help.

CONCLUSION:
The device is the least expensive, if you want to have the recording. Therefore 5 stars.
For more money (from about 150-200 EUR and up), there are more solid specimens with bracelet and separate finger sensor (meaning NOT the PO-400!), Which are also easier to use.
The PO-300 has a better display and battery instead of batteries, same software.