Simple Operation- switch on your voice recorder, one button for recording. press the REC, start the recording, press STOP, end the recording, press PLAY, listen what you just recorded, and then Press A-B, select your important section to repeat. Easy to playback with inner powerful speaker, support external sound speaker playback, let you enjoy superior recording quality. Clear Voice Record- recording with noise redution, you will get super clear recorded voice, the sensitive microphone help you to catch speakers words in an interview, lectures, meetings. Voice Activated Recording- automatic voice reduction function, it starts recording when sound is detected or turn to standby state, saving recording time and reduce power consumption. MP3 Player Function- this voice recorder can be used as an MP3/music player, you could enjoy the music after your tired study, meeting and so on. Also can function as a detachable data storage device.you can take along your favorite pictures and documents whenever you go.Simply cut-and-paste or drag-and -drop files to or from it via USB connection, the player will appear as a removeable drive in Windows. and long time uses DSP noise reduction technology to filter out environmental noise, has recording, 1536kbpsto restore the real scene. It can continuously record for more than 30 hours and play for 7 hours. Material: aluminium alloy housing False color OLED display With speaker microphone Support WAV recording and long time recording and playback of audio or MP3 music Record audio from LINE-IN Time recording, voice operation recording, telephone recording Support real-time recording 128X64 lattice screen Support multiple language Recording indication Sound control function (VOR) available A-B repeat function: repeat a certain part of a music file Delete function: delete MP3 music files and voice files stored in the device. You can choose to delete a single file or all files Recording and replaying of recording files ,USB connecting, facilitating upload and download of voice files EQ modes supported, multifunction as mp3 player, 24 languages available for control panel. Low battery power indication Built-in rechargeable lithium battery Dimension: approx. 8.5 x 3.5x 1.5 cm