Item Type: Voice Recorder PenMaterial: ABSRecording Format: WAVMusic Format: MP3 WMA WAVBuilt In Polymer Lithium Battery: 120mAhSize: Approx. 13.3x1.2cm / 5.2x0.5inPackage List1 x Voice Recorder Pen3 x Pen Refill1 x Instruction Book1 x Charging Cable1 x EarphonePlease allow some error due to manual measurement.1EASY 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. 2NOISE REDUCTION: DSP digital noise reduction technology, for different types of noise in the environment, filtering and attenuating environmental noise. 3INTELLIGENT PASSWORD PROTECTION: Voice activated recorder supports password setting for power on and off, to protect sound data. 4360 DEGREE RECORDING: Voice recorder pen supports 360 degree recording without dead space, can easily put in pockets, bags, drawers to record. 5SAVE MEMORY SPACE: Recorder pen is recorded when there is sound, no sound on pause. Extend the length of recording, save memory space. 6ACCURATE TIME STAMP: Voice recording pen records file creation time and end time, accurate to the second, easy to browse and find files.