Wireless and Batteryless Outdoor Doorbell Waterproof IP 65 Snow Rain Humidity [WIRELESS = TRANQUILITY]: Why opt for a battery-free system? It is well known, batteries do not like humidity, negative temperatures and strong heat at all. Rest assured, totally suitable for outdoor use, the battery-free wireless doorbell is absolutely not afraid of extreme weather conditions. [NEVER MISS YOUR PACKAGES]: Another notice in the mailbox? Or, a customer who is impatient because you are in the reserve of your shop? And yes... bad luck, the batteries of your wireless doorbell are still dead, and of course, it always happens at the wrong time! < p> [INCREDIBLE TECHNOLOGY]: Guaranteed operation every time! We use a state-of-the-art self-feeding mechanism that is reliable, robust and efficient. Also, the extended antenna ensures excellent range that can cross walls and slabs without any problems. [ECONOMIC AND ECOLOGICAL]: No need to have a stock and battery at home, save money with your chime kit