1) Large memory storage space: 4GB 2) Long time recording 3) Timed recording 4) Music playback function 5) 128X64 lattice screen 6) Different languages 7) Recording indication 8) Sound control function (VOR) available 9) 7 equalization modes: NOP, ROCK, POP, CLASSOL, SOFT, JAZZ and DBB 10) A-B Repeat: repeat a certain part of a music file 11) Delete function: delete MP3 music files and voice files stored on the device. You can choose to delete a single file or all files. 12) Recording and playback of recording files 13) USB connection, facilitating uploading and downloading of voice files. 14) Built-in speaker 15) Low battery indication 16) Built-in lithium battery, rechargeable, saving your money and caring and protecting the environment. 17) System time: press Menu button to enter, press Vol+ or Vol- button to select the date and time you want to modify. When the number is flashing, it means the value can be modified. Press the Previous or Next button to change the value. When you finish adjusting, press the Menu button to save the change, exit the System Settings main interface and press the Play button to turn off the device. Then turn off the power switch. Because turning off the power switch directly will cause inaccuracy in timing. *Specifications: 1) Highest SHQ: 2760 minutes 2) Highest SP: 3840 minutes 3) Highest LP: 8460 minutes 4) Frequency: 20Hz20KHz 5) Maximum output: 300mW 6) Storage media: Built-in flash 7) External input: Stereo headphone: 3.5 stereo pie; l External microphone: 3.5 pie stereo; USB Cable: USB 1.1 / USB2.0 PC Interface Maximum Speed 8) Recording Bitrate: Highest SHQ: 128 kbps; Highest SP: 32 kbps; Largest LP: 8 kbps 9) Built-in MIC: omnidirectional microphone 10) External: Dynamic 20mm, 16 ohm 11) S/N (ratio): 80 db 12) Dimensions: 83mm * 35mm * 12mm 13) Weight: 35g 14) Battery (each capacity): Recording: 20H; Transmission: 13H (connect headphones to listen 15) Display: 128 x 64 lattice screen 16) Recording format: MP3, WAV 17) Operating: 0 degrees Celsius40 degrees Celsius