No one would guess that this completely working desk best calculator hides a secret. It really is an ideal device for any private detective or private investigator in corporate or personal investigations as it wouldn't arouse suspicion, as a calculator is common location in any house or workplace. There is no visible indication that this really is something but a calculator as the voice recording program is hidden inside.
The calculator recorder makes use of an SD card, as much as 32GB, which can store 570 hours of recording, and is battery powered, giving around 12 hours of sound activated recordings. The back of the calculator has to be removed, by the private investigator or private detective, to access these and to operate the start/stop control. The use of an SD card reader enables the private detective’s or private investigator’s evidence to be retrieved on his or her PC to support the investigation in progress. This is an very successful device for covert surveillance as no one would suspect their conversations were being recorded by such an innocuous item.