Abstract This work proposes a battery-free wireless burglar alarm system based on LoRa backscattering. The system consists of multiple wireless nodes that send an alert when its sensor is triggered. The primary goal is to significantly reduce the power consumption of these wireless nodes. eliminating the need for battery replacements and maintenance associated with commercial systems. https://www.bekindtopets.com/mega-sale-Israel-Flag-Distressed-iPhone-14-Pro-Max-Folio-Case-p26681-top-mega/