This Resi9 XP SO is a modular bell. It sends an audible indication in the room. The noise is up to 80dB. The Power consumption is 3.6VA. The Ue rated operational voltage is 8VAC to 12VAC. The operating frequency is 50Hz or 60Hz. It can be mounted on DIN rail for modular installation. Its width is 2 pitches of 9mm. The dimensions are (W) 18mm x (H) 81mm x (D) 65mm . The colour is white (RAL9003). According to IEC 60529 standard, the degree of protection is IP20 or IP40 in modular enclosure. The operating temperature is -25°C to 50°C. The storage temperature is -40°C to 70°C.