Wireless and Battery-Free Doorbell Outdoor Waterproof IP 65 Snow Rain Humidity [BATTERY-FREE = PEACE OF MIND]: Why choose a battery-free system? It is well known that batteries do not appreciate moisture, sub-zero temperatures, and high heat at all. Rest assured, perfectly suitable for outdoor use, the battery-free wireless doorbell is absolutely not afraid of extreme weather conditions. [NEVER MISS YOUR PACKAGES AGAIN]: Another delivery notification in the mailbox? Or a customer getting impatient because you're in the storage room? And yes... bad luck, the batteries in your wireless doorbell are still dead, and it naturally always happens at the wrong time! [INCREDIBLE TECHNOLOGY]: Guaranteed operation every time! We use a state-of-the-art self-sufficient mechanism that is reliable, robust, and efficient. In addition, the extended antenna ensures excellent range that can pass through walls and slabs without problems. [ECONOMIC AND ECOLOGICAL]: You don't need to have a stock and battery at home, save money with your battery-free chime kit. By avoiding battery changes, you also make an ecological gesture by avoiding the long and complicated recycling of batteries [EASY AND QUICK INSTALLATION]: No complicated programming or other risky manipulations. Choose the location for your doorbell, plug the chime into an electrical outlet and that's it. Then you can choose the volume level of the ringtone and the melody that suits you.