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General descriptionThis waterproof wireless doorbell is ready to use right out of the box, having been paired before delivery. It requires no wiring or electrician installation, allowing for a quick setup in just one minute. Simply plug the receiver into an outlet, and it is ready for use. The doorbell operates on high-frequency electronic technology with FM signal mode, ensuring strong anti-interference capabilities and one-to-one signal matching, with a detection range of up to 600 feet in clear environments.Technical specificationsOperating temperature: -4°F to 140°FProtection rating: IP45 (dustproof and waterproof)Volume levels: 4 adjustable levels from 0dB to 100dBNumber of ringtones: 38Other informationEquipped with a temperature and humidity sensor for real-time monitoring of indoor conditionsFeatures a time reminder functionMade from high-quality ABS material with excellent fire-resistant propertiesSelf-generating transmitter, eliminating the need for batteries