Specifications Memory: 8GB SN: 80db Frequency: 20Hz-20kHz Departure Max: 300mW Display: Screen 128 x 64 dot matrix External entrance: Headset Microphone: 3.5mm USB cable: PC interface USB 1.1/USB 2.0 Recording format: WAV Size: 8 x 3.5 x 1.1cm Weight: 35g Battery (fully loaded): 30 recording times Package contents 1 x 8GB USB recorder 1 x 3.5mm mini jack audio cable 1 x Phone recording adapter with RJ11 cable 1 x USB cable 1 x Headset 1 x Microphone 1 x User manual feature introduction in different languages. One-click recording. Very easy to use menu interface. Can be used as MP3 player and USB flash drive. AB Repeat: Repeat a certain part of the music file. Equipped with telephone interface for recording calls. USB connection for easy uploading and downloading of voice files. The built-in clock function can add timestamps to recordings. Delete function: Delete MP3 music files and voice files stored in the device. The device makes it easy to transfer files to your computer via cable while in use. With voice control function (VOR), you can start recording by voice control and pause when there is no sound. Note that when the battery power is low, please charge it in time. When charging the battery, turn the power button to the (ON) position. Each time you turn off your device, first turn it off with the play button and then turn off the power switch to avoid other problems.