Features: Voice-activated recording, time stamping, intelligent noise reduction, automatic power-off.  One-click recording, one-click save.  The default WAV recording format, bit rate 382kbps.  Support lossless music playback, such as WAV, APE, FLAC and other formats.  There are four specifications of 4G, 8G, 16G and 32G.  Support for headphone remote control.  Version: USB 2.0, support USB 3.0.  Headphone output: two-channel headphones, 32ohm.  Product memory: 4G, 8G, 16G, 32G (optional).  Battery capacity: Built-in 240mAh polymer lithium battery.  Recording format: WAV (lossless recording) Bit rate: system default WAV format 512KBPS.  Music format: MP3/WAV/WMA/FLAC/APE;  Frequency response: 20Hz~20KHz;  SQ ratio: > 88DB;  Distortion: < 0.05%;  Operating system: For win98/window xp/Windows7/windows8/MAC OS;  Size: Approx. 7.2 x 2.5 x 0.7cm / 2.83 x 0.98 x 0.28inch;  Weight:84.6g;     Note: 1. This product has a built-in polymer lithium battery. Do not throw this product into a fire, because the lithium battery may explode; do not immerse the product in water or other liquids. If the battery is short-circuited, it may explode; do not keep the product in a hot place such as sunlight and fire.  2. Please back up the data yourself during the use of this product to avoid data loss; the company is not responsible for the loss of data caused during the repair process, and is not responsible for accidental damage that may occur during the use of this manual.     Package Included: 1 x Voice Recording Pen;  1 x Earphone;  1 x Cloth Bag;  1 x English Manual