tested small meeting (key on the table and very close participants) impeccable! good record. Tested amphitheater in conference, the rendering is not so good but because of the room's PA system, javais kept the key with me at 4 ° bottom row of the auditorium ... about 4 hours of recording, without having to reload the key and it largely was room above (about 1GB used) ... remains to be tested how long it can record before needing to be recharged or before reaching the complete filling of the memory space (!) ... the light stays on good 10 seconds before blinking red to start recording ... do not panic, I did not expect quite early!