You can record everything you want in any conditions. Especially in class, speech, lectures, business meetings and interviews. It is perfect for students, teachers, tourists, journalists and business person. Screen: 28*25 Capacity: 4GB/8GB/16GB/32GB (not included) Recording time: 72hrs/144hrs/288hrs/578hrs Charging time: around 10hrs Format: MP3 Audio recording fps: 128Kbps MIC: built-in External storage: Micro SD card Battery: 270mAh System: Win 98/2000/XP etc This Dictaphone is easy to use with one key recording and saving. You can also use it as a MP3 music player. Besides, it can be used as a U disk for data storage or TF Flash Card Reader. It is portable and handhold, so you can take it into your pocket or wallet, then the recorder device will be ready to your call at anytime you need. Screen: 28*25 Capacity: 4GB/8GB/16GB/32GB (not included) Recording time: 72hrs/144hrs/288hrs/578hrs Charging time: around 10hrs Format: MP3 Audio recording fps: 128Kbps MIC: built-in External storage: Micro SD card Battery: 270mAh System: Win 98/2000/XP etc