The LH-922BC adopts automatic temperature compensation technology with strong ability to meet different environments. It is fully compliant with CCC & EN-50131-Grade2 & EN300440 and features high EMI immunity. It has a unique wiring and is easy to install. It supports AND/OR function (MW&PIR optional). Its microwave frequency is 10.525GHZ and pet immunity is up to 35KG with a look-down function.