How do I get the recordings off the device?

Plug the recorder into a computer's USB port and it mounts as a storage drive. The files are WAV, so they open in any audio player or editor without conversion.

Can I record while it is charging?

Yes. The recorder supports charging over USB while it records, so a power bank or laptop port can extend a long session.

Does it work as a hidden recorder?

It has no display or lights on the front and a slim body, but it is a normal recorder, not a covert device. Check your local rules on recording people without consent.

How much audio fits on each version?

The 32GB model holds up to about 36 hours, and capacity scales down with the smaller 4GB, 8GB and 16GB versions. WAV is uncompressed, so expect large files.

Can I add a memory card?

No. Memory is internal and there is no card slot, so pick the capacity you need up front.

Will it pick up a lecture hall from the back?

The unidirectional mic is rated for 10 to 20 meters, but it favors sound from the direction it faces. Sitting closer or aiming it at the speaker gives cleaner audio.