Discreet, I let him hang on a table, without attracting the slightest doubt. She was manipulated and inspected mechanically without waking anything. Autonomy of over 3 hours. Practical, because the recording stops when the surrounding noise is low. A flat at the sound quality. To understand the words you must speak to 50 centimeters in a normal voice. That was still a good idea of the environment. Use rather than dictaphone spy