Wireless and Battery-Free Doorbell Outdoor Waterproof IP65 Snowproof Rainproof Moistureproof [BATTERY-FREE = PEACE OF MIND]: Why choose a battery-free system? It is well known that batteries do not like humidity, sub-zero temperatures or extreme heat. Rest assured, fully adapted for outdoor use, the battery-free wireless doorbell is absolutely resistant to extreme weather conditions. [NEVER MISS YOUR PACKAGES AGAIN]: Another notification slip in the mailbox? Or a customer getting impatient because you're in the warehouse? Well... too bad, the batteries in your wireless doorbell are still dead, and of course it always happens at the wrong time! INCREDIBLE TECHNOLOGY: Guaranteed to work every time! We use a state-of-the-art self-sufficient mechanism that is reliable, robust and efficient. The extended antenna also ensures excellent range, allowing it to penetrate walls and tiles without any problem. ECONOMIC AND ECOLOGICAL: No need to keep a stock of batteries at home, save money with your battery-free doorbell pack. By avoiding battery changes, you also make an ecological gesture by avoiding the long and complicated recycling of batteries. [QUICK AND EASY INSTALLATION]: No complicated programming or other risky operations. Choose the location for your doorbell, plug the doorbell into an electrical outlet, and that's it. Then you can choose the volume level of the ringtone and the melody that suits you.