Inovonics EN1244 EchoStream Wireless Smoke Detector with LED Indicator, 902-928 MHz

Wireless smoke detector with onboard sounder and LED indicator for complete visibility of detector status. Features local test and silence alarm functions, low battery detection, and maintenance warnings to keep you informed. Tamper switch prevents unauthorized sensor removal. Self-monitoring technology automatically supervises the radio link and alerts when sensor maintenance is needed or batteries are low. Operates on frequency-hopping spread spectrum (902-928 MHz) with 3-minute check-in intervals. Smoke sensitivity rated at 2.0% per ft. obscuration. Includes one CR123A battery with low battery signal at 2.7V. Dimensions: 5.3" x 2.3". Designed for operation in the United States.