This is a story about how five construction managers were suspended for drinking on the job after a local TV station installed hidden cameras at a big construction site. The cameras caught several people drinking on the job that led to the suspensions. You can read the rest of the story HERE It is a good example of what DVR Hidden Cameras are used for. Generally speaking they are used to catch people doing things they shouldn't be doing-even drinking on the job. Most commonly they are used as nanny cameras and for home security but they can be used to catch employees stealing from a business, or a spouse cheating on their partner. Our DVR Hidden Cameras use an SD card to record images so no external DVR is needed. We value any feedback on these posts you may have. Let us know your thoughts. Since 2005 Guardian Self-Defense & Security Products LLC has provided personal security to over 45,000 consumers. We offer a full-line of premium self-defense weapons such as pepper spray, stun guns, tasers, pepper mace, personal alarms and other self-defense items