Key finder

Key finders, also known as keyfinders, key locators, or electronic finders, are small electronic devices fitted to objects to locate them when misplaced or stolen, such as keys, luggage, purses, wallets, pets, laptop computers, toddlers, cellphones, equipment, or tools, and to transmit alerts, e.g., that one's restaurant table is ready or a nurse is needed. Some key finders beep or flash lights on demand.