1. shell made of acrylic material, anti-fall strongly. professional atj2129 recording pen chip, hd recording. timestamp, recording file name by date automatically. record timer and turn on at your set time   2. agc function, adjust the noise source automatically. monitor recording in real time / fuction hearing aid. voice recorder, mp3 and mobile hd. play function: support loop recording, AB segment repeat function   3. built-in high fidelity speakers, direct external sound. starting with password to protect files. Support checking the remaining recording time. MIC recording function.   4. Built-in high fidelity speakers, direct external sound. Free eye, led backlight, tft lcd color screen. Support voice activated mode. Detect low battery and save recording files automatically   5. Support for recording monitoring. Built in 230mah rechargeable lithium battery. USB 2.0 connector, easy to upload and download files      1. recording format: wav / mp3   2. music playback format: wma / wav / mp3 / ogg etc audio format   3. battery recording time: about 25 hours   4. battery play time: about 15 hours   5. battery: 230mah lithium battery battery charging time: about 3 hours   6. lcd resolution: 80 * 160 dot screen   7. usb interface: high speed usb 2.0   8. Built-in speaker: 18mm * 26mm 8 omega / 1w   9. working temperature: 0 to 40 degrees   10. Sample recording rate: 48khz   11. Headphone jack: 3.5mm, dual band   12. Noise-to-signal ratio: 80db   13. Compatible system: windows 2000 & above   size:93 x 24mm   Material:plastic   colour:black      Package Contents:   1 x Voice Recorder      Only the above package content, other products are not included.   Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.