Product information:

Recording format: MP3
Recording sampling rate: 128kbps
Frequency: 20Hz~20KHz
Storage media: Micro sD(TF card)
S/N(noise ratio) : 80db
Battery powered: 4.5 hours of recording
Size :56*18*9.5(mm)

Product features:
The shell is made of plastic and anti-fall
ATJ3315 professional recorder chip, HD recording
Timesamp automatically names recording files by date
AGC function automatically adjusts the noise source
Mobile voice and HD recorders
Detects low battery power and automatically saves the recording file
One-key recording
Integrated lithium battery, rechargeable
USB 2.0 interface for easy uploading and downloading files

Packing list:
Recording pen+8GX1PCS/Recording pen+16GX1PCS/Recording pen+32GX1PCS