type of mounting: wall or free-standing, type of signal: optical and acoustic, type of detection: smoke detector, signal volume: >85 dB, at a distance of 3 m, operating temperature: 0 °C to 40 °C, operating humidity: 5-95 %, lifetime: 10 years, power supply: 1× 9 V, accessory, dimensions: 90 × 33 mm, sales packaging: 1 piece, small box, warranty period: 2 years