Feature: 1. EASY TO OPERATE: MP3 recorder pen supports one touch power on, one touch power off, write and record for emergency recording or a variety of scenarios. 2. NOISE REDUCTION: DSP digital noise reduction technology, for different types of noise in the environment, filtering and attenuating environmental noise. 3. INTELLIGENT PASSWORD PROTECTION: Voice activated recorder supports password setting for power on and off, to protect sound data. 4. 360 DEGREE RECORDING: Voice recorder pen supports 360 degree recording without dead space, can easily put in pockets, bags, drawers to record. 5. SAVE MEMORY SPACE: Recorder pen is recorded when there is sound, no sound on pause. Extend the length of recording, save memory space. 6. ACCURATE TIME STAMP: Voice recording pen records file creation time and end time, accurate to the second, easy to browse and find files. Specification: Item Type: Voice Recorder Pen Material: ABS Recording Format: WAV Music Format: MP3 WMA WAV Built In Polymer Lithium Battery: 120mAh Size: Approx. 13.3x1.2cm / 5.2x0.5in. Package List: 1 x Voice Recorder Pen3 x Pen Refill1 x Instruction Book1 x Charging Cable1 x Earphone Note: Please allow some error due to manual measurement.