Features: It is made of high quality titanium alloy,strong and durable. Support MP3/WAV/WMA format. Automatic recording gain function can automatically enhance the recording quality when monitor. When the power of the recording pen is too low, the recording pen will automatically shut down and save the previous data in memory. Built-in capacitive microphone with extremely wide frequency response range can directly convert sound into electrical signals for convenient storage. Intelligent voice recording can reduce blank and useless files and effectively save storage space. Specifications: Material: Titanium alloy Size: Approx. 90.7*31.8*12mm/3.57*1.25*0.47inch Earphone Interface: 3.5mm/0.14inch Recording Format: WAV Recording Power: 4.5-6mA CPU Frequency: 24kHz Sampling Rate: 4kHz/32kHz/48kHz Play Format: MP3/WAV/WMA Package list: 1 x Recording Pen 1 x Instructions 1 x Data Cable 1 x Earphone 1、It is made of high quality titanium alloy,strong and durable. 2、Support MP3/WAV/WMA format. 3、Automatic recording gain function can automatically enhance the recording quality when monitor. 4、When the power of the recording pen is too low, the recording pen will automatically shut down and save the previous data in memory. 5、Built-in capacitive microphone with extremely wide frequency response range can directly convert sound into electrical signals for convenient storage.