Description Wireless and battery-free outdoor doorbell, IP 65 waterproof, resistant to snow, rain, and moisture [BATTERY-FREE = WORRY-FREE]: Why choose a battery-free system? Batteries, as we all know, cannot tolerate moisture, sub-zero temperatures, or extreme heat. Don't worry, the battery-free wireless doorbell is completely suitable for outdoor use and completely resistant to extreme weather conditions. [NEVER LOSE PACKAGES AGAIN]: Another delivery notification in the mailbox. Or a customer who's getting impatient because you're in your store's warehouse. And yes, tough luck, your wireless doorbell's batteries are dead again, and of course, it always happens at the wrong time! [AMAZING TECHNOLOGY]: Guaranteed to work every time! We use a state-of-the-art, reliable, robust, and efficient self-powered mechanism. The extended antenna also ensures excellent range and easily penetrates walls and panels. [ECONOMICAL AND ECOLOGICAL]: You don't need batteries or accessories at home – save