Our necklaces incorporate a sensor that is disguised as a piece of jewelry, which detects the presence of date rape drugs in drinks. If the device is briefly submerged into liquid, then a message will be sent to the user through various mediums such as a text message over an Apple Watch, Fitbit, etc. on whether the drink is safe. If the substance is contaminated, then the app should notify the user with the specific contaminant and a plan of action. Please visit our About page for more information.