Wireless and Battery-Free Doorbell, Waterproof Outdoor, IP 65, Snow, Rain and Moisture Resistant [BATTERY-FREE = PEACE OF MIND]: Why choose a battery-free system? It is well known that batteries do not like humidity, freezing temperatures and high temperatures at all. Don't worry, the battery-free wireless doorbell, completely suitable for outdoor use, is absolutely not afraid of extreme weather conditions. [NEVER LOSE YOUR PARCELS AGAIN]: Another delivery notice in the mailbox? Or a customer starting to get nervous because you are in the warehouse of your store? And yes... bad luck, the batteries of your wireless doorbell are still flat and of course, it always happens at the wrong time! [AMAZING TECHNOLOGY]: Guaranteed to always work! We use a cutting-edge self-powering mechanism, reliable, robust and efficient. In addition, the extended antenna ensures an excellent range that can pass through walls and slabs without problems. [ECONOMIC AND ECOLOGICAL]: No need to have supplies and