The button investigation evidence collection button straight record makes secret inquiries camera mainly to use in the simplex operation, body carrying, walks the situation which while pats; May also install Yu position fixedly, after absorbing the record finished brings back, but must pay attention to the effective duration is two hours, surpassed the time memory power source to exhaust namely stops working the camera and the memory is the wired connection, did not use receives and dispatches the equipment wireless, determines not easily by the sensor, also did not have the shield or possible which intercepted A : 1) the volume ultra is small, the complete set of equipment may lay aside easily in the fragrant cigarette case, the covert very strong 2) camera by the memory power supply, does not need the external connection battery 3) segment to simplify directly, line diameter superfine, non-burden's video frequency audio frequency 4) matches the high keen microphone, sound reducibility high 5) may establish the video frequency memory picture size at will, uses the storage space 6) system bringing clock effectively, the record picture simultaneously the recorded time, increases presents evidence accurate 7) has the province electricity pattern, when the video recording LCD the display monitor automatic shut-off 8) simplicity of operator, the pressed key may enter the record pattern 9) reservation many kinds of output patterns directly, LCD, TV PAL, USB(monitor, television, computer) B : the applicable scope for the criminal investigation, the technique detects, after detects, the eradication of , apprehending smugglers, the politics to guarantee, the country to guarantee, safely, counter-corrupt, counter-terrorism, counter-evil and so on departments, as well as negotiates on the spot, interrogation room, abundant color, television station program director, places and so on film and television photography direction