Peer-to-peer key finders no longer require a separate "base" they are all functionally identical and based on a communication system wherein each device can find all the others individually. The transmitter can also contain information to help return it to its rightful owner. Some distributors include a cost-effective key-return service that assists in returning the keys should they be lost in a taxi, bus or other public place, provided the customer registered their devices and contact information. Using a radio signal removes the risk of false alarms. All wireless key finders have to "listen" for a searching transmission, resulting in battery replacement at intervals ranging from 3 months to a year. A separate transmitter is used to activate one or more receivers. Because of this low quality and unreliability, these early key finders were soon discarded and were unpopular for serious needs.Īs electronics became smaller and cheaper, and battery life improved, radio became viable to locate the keys, which were fitted with a small receiver. Determining what was a clap or a whistle proved difficult, resulting in poor performance and false alarms. ![]() ![]() Early models of key finder were sound-based, and listened for a clap or whistle (or a sequence of same), then beeped for the user to find them.
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