Specifications: Product Name: Keychain digital voice recorder.  Recording format: WAV / 192 kbps.  Music playback format: WMA/WAV/MP3/OGG and other audio formats.  Battery recording time: about 15 hours.  Battery life: about 10 hours.  Battery: 150mAh lithium battery charging time: about 2 hours.  Signal to noise ratio: 80 decibels.  USB interface: USB 2.0 high speed.  Save recording time: about 188H/ 32GB Save recording time: about 376H.  Working temperature: -5 to 40 degrees.  Recording sampling rate: 48KHZ.  Headphone jack: USB jack.  Compatible system: Windows 2000 and above.  Size: 70 x 23 x 8 mm (L x W x T).  Net weight: about 34g.     Features: The shell of this product is made of metal and zinc alloy materials, which have strong anti-fall properties.  ATJ3315D professional voice recorder chip, high-definition recording.  Timestamp, automatically naming the record file according to the date.  AGC function, automatically adjust the noise source.  Voice recorder, MP3 player, USB flash drive.  Support voice control induction recording.  When the battery power is low, automatically save the record file.  Playback function: one-key record/save.  Plugin headphones to listen to music.  password protection.  Long battery life.  Built-in rechargeable 150 mA lithium battery.  USB 2.0 interface, convenient to upload and download files.  Color: black/silver.     Package Included:   1 x Recorder.  1 x English Manual