First Alert BRK SM601 Battery Powered Photoelectric Smoke Alarm

First Alert BRK SM601 Battery Powered Photoelectric Smoke Alarm Battery-powered photoelectric smoke alarm from BRK (Resideo) with replaceable AA batteries included. Features SoftCue low-battery replacement reminders, LED status indicators, a side-loading battery drawer, a standardized mounting bracket and an optional Easy-Fit trim ring. Stand-alone unit (not interconnectable). Key Features Photoelectric smoke sensing with a 10-year service life Replaceable AA batteries included (replace with Kendal LR6, Energizer E91 or Duracell MN1500) SoftCue replacement reminders: gentle sound and light low-battery cues reduce disruptive chirps LED indicators for alarm, power, battery and replace-device status Side-loading battery drawer for battery changes without removing the alarm Standardized mounting bracket and optional trim ring for replacement installs Latching feature identifies the initiating alarm Silence feature for nuisance alarms Self-diagnostic test with malfunction warning (3 chirps); end-of-life signal (5 chirps) Two tamper-resistant locking pins (battery drawer and/or alarm to bracket) Fully screened sensing chamber resists dust and insects 85 dB at 10 ft piezo horn Specifications Sensor Photoelectric Power source Battery (AA, replaceable) Alarm dimensions 5.2 in dia. x 1.76 in H Weight 0.48 lb (217.72 g) Audio alarm 85 dB at 10 ft (3 m) Interconnect No Operating temperature 40-100 °F (4.4-38 °C) Humidity range 20-95% RH non-condensing (agency compliance 93% max) Test/Silence Push and release center button Color White Standards UL 217; meets NFPA 72, NFPA 101 and ICC requirements In the Box SM601 smoke alarm AA batteries (included) Standardized mounting bracket Easy-Fit trim ring (optional use) Mounting screws and anchors (shown in manufacturer contents photo) Related Models SM601-CP (6-pack) SM610 (10-year sealed battery version) SM6W01 (hardwired version) Replaces: SMI100, SM200 Specifications taken from the manufacturer's published literature. Manufacturer specifications are subject to change without notice.