Introducing our multifunctional key finder set, which includes 1 transmitter and 4 receivers. This set allows you to locate multiple items at the same time, offering convenience and efficiency. Operating this key finder is simple, as no app is required. With just one click of the button, a sound will help you locate your misplaced item. The receiver uses CR2032 button batteries (not included), and each battery can last up to 6 months, ensuring long-term use and minimal battery replacement. The key finder emits a loud sound with a volume of 75–80 decibels. The effective search range reaches up to 15–30 meters (49.2–98.4 feet) in open space. This key finder set is versatile and can be used with keys, wallets, remotes, glasses, phones, dog collars, or other frequently misplaced items. Package includes: - 1 x Base - 1 x Transmitter - 4 x Receiver - 1 x Manual - 4 x Keychain - 4 x Double-Sided Tape 100% Satisfaction: Customer satisfaction is our priority. If you experience any issues with the product, please contact the seller for assistance. We are committed to providing reliable after-sales support.