LEL Technology Co.,Ltd: We are a manufacturer in China that specializes in security alarm systems, our main products range include alarm control panels, passive infrared motion detectors, dual tech PIR+Microwave motion detectors, pet immunity motion detectors, outdoor active infrared beam detectors and multi-beams infrared barrier fence detectors, thanks to our experience with security products, we are also able to offer completed alarm solution that involves with alarm control panels and alarm detectors. Our products ...