The MSD-300 Wireless Smoke and Heat Detector. A smoke and heat detector designed to provide early detection of a developing fire. In addition to transmitting threat information to the control panel, the MSD-300 can warn of danger with a built-in audible alarm. Unlike typical smoke detectors, this device responds not only to visible smoke but also to a rapid increase in temperature, providing more comprehensive protection against the risk of fire. KEY FEATURES: Photoelectric system for detecting visible smoke accompanying a developing fire, meeting the requirements of the EN54-7 standard; Temperature rise detection system compliant with Class A1R requirements according to the EN54-5 standard; Built-in audible alarm to warn of threat detection; Detection and indication of contamination in the detection chamber facilitates system diagnostics and maintenance; Manual test and alarm reset button facilitates regular verification of correct operation; Precise mechanical filter prevents insects and dust from getting inside the detector; Power management system allowing for many years of operation without having to replace the CR123A lithium battery; Housing tamper detection.; TECHNICAL DATA. Operating frequency band: 433.05-434.79 MHz; Radio communication range (in open area): up to 200 m; Battery: CR123A 3 V; Battery operation time: about 3 years; Standby current consumption: 50 A; Maximum current consumption: 20 mA; Class according to EN 54-5 (thermal sensor): A1R; Minimum static alarm response temperature: 54°C; Maximum static alarm response temperature: 65°C; Operating temperature range: 0°C..55°C; Housing dimensions: ø108 x 61 mm; Weight: 170 g; The set includes: Detector; dust cover; CR123A lithium battery; mounting elements; user manual; If you need additional elements such as an alarm cable, additional keypads, GSM modules or other alarm accessories, you will find them in our other auctions.