The BOSCH-DS1102I is a rectangular glassbreak detector that uses microprocessor-based sound analysis technology (SAT) to listen for the specific frequencies associated with breaking glass. The unit can be mounted on a ceiling or wall.The DS1102I can be used to detect breakage of plate, tempered, laminated and wired glass types and its built-in environmental test feature alerts the installer to false alarm hazards in harsh environments. Also known as -Bosch DS1102I Current: 23 mA at 12 VDCVoltage: 6 VDC to 15 VDCOperating Temperature: -29?C to +49?C (-20?F to +120?F) For UL Certificated installations, 0?C to +49?C (+32?F to +120?F)Radio Frequency Interference (RFI) Immunity: No alarm or setup on critical frequencies in the range from 26 MHz to 950 MHz at 50 V/mAlarm: Form C reed relay rated 3.5 W, 125 mA at 28 VDC for resistive loadsTamper: Normally-closed (NC) cover-activated tamper switch with separate terminals. Contacts rated at 28 VDC, 125 mA maximum