The wireless outdoor alarm MSP-300 R, designed for outdoor installation, is intended to work in conjunction with PERFECTA devices (models WRL and PERFECTA 64 M with the attached PERFECTA-RF module) and the MTX-300 433 MHz controller. The alarm uses the modern SPIRIT1 system, distinguished by optimized energy consumption management, which ensures a long service life in harsh atmospheric conditions. The reliable operation of the MSP-300 is also supported by an effective 3.6 V lithium-thionyl chloride battery, designed for special applications, primarily military and medical.