BRK Electronics First Alert FG250LB 9V DC Lithium Battery Operated Ionization Smoke Alarm

Basic battery operated smoke alarm perfect for use in existing multi-family applications. Hinged cover for easy battery replacement Lighted Power and Alarm indicator Silence feature Tamper resistant locking pin RV approved 9V Lithium battery operated 10-Years Limited Warranty Model # FG250LB Weight 4.8 oz Dimension 4.25" dia x 1.6"H Operating Voltage 9V Lithium Battery Powered Temperature Range 40°F (4°C) to 100°F (38°C) Humidity Range 10% to 95% relative humidity (RH) Audio Alarm 85dB at 10 feet Test/Silence Electronically simulates smoke condition, causing the unit to alarm and silences unit. Alarm Reset Automatic when smoke clears Interconnections Up to 18 units of First Alert or BRK Smoke, CO and Heat Alarms. Maximum of 12 smoke alarms. See user's manual for details. Smoke Sensor Dual Ionization Indicator Lights/Sounds