64 minutes of recording space per disc in stereo mode or 128 minutes of recording space in mono. Because of the amount of space on each disc, there is normally no need to open the machine to change discs in the field. The ability to leave the machine in recording mode with the pause on for long periods without excessive battery consumption so as to be able to record at the press of one button. The machines are now VERY cheap. Some drawbacks are as follows 1.
Some people find the controls rather small for their fingers.
The manual recording level can't be adjusted while the machine is running. It is necessary to press the pause button, alter the recording level, then press the pause button again. With practice this isn't a major problem. Impossible to repair in the field, so we carry a spare machine each, but as they are so small this is no big deal. I should finish by mentioning that the 1998 Wildlife Sound Recording Society's annual competition winning entry was recorded and mastered on one small cheap minidisc machine.