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Spy digital voice recorder edic-mini tiny A21 300H usb
The EDIC-Mini Tiny digital voice recorder (DVR) is used for professional voice recording on to a flash media following by copying to a computer. Model A21 differs from other models in its being round, having leather case and the ability to be charged from USB port. These features certainly give it a perfect disguise of a simple trinket, but really it's not. Retail cost of A21 300h is about 700 $.
built-in rechargeable battery (240 mAh capacity), charged from USB port
at sample rate 8 kHz, without compression - 120 hours;
K is the coefficient, showing how many times the maximum record time decreases at record mode change relative to 2-bit ADPCM mode (maximum recording capacity). For example, the record time will be 17920/5=3584 minutes for model A21 300h (17920) in the without-compression mode, at sample rate of 8 kHz (k=5).
