Features: Built-in Li-ion battery (Rechargeable lithium battery, reused) One-touch operation, simple and convenient, long work Widely used for musical instrument records, news interviews, judge records, student learning course records, sound evidence storage, music preservation, etc. Specifications: Recording format: WAV Recording bit rate: 512kbps Zinc alloy shell + external loudspeaker The music format supports:MP3, WAV, WMA,APE, FLAC and so on Battery can record time: 18 hours External sound playback time: 3 hours Dimensions:7 x 2 x 0.9cm Weight:38g Package: 1x digital voice recorder 1x 2 in 1USB Charging Cable 1x user manual