Matelec FSA-30000 Photoelectric Smoke Alarm, Detector, Battery Operated with 10 Year Lithium Battery, 85dB @ 3mtr, 114mm Dia x 40mm, Surface Mount, White

Features:
• Discrete slimline appearance
• Wireless interconnect up to 40 units
• Simple pairing process
• Wireless distance up to 100m clear line of sight
• 3V DC non-replaceable 10yr lithium battery
• No hard wiring - very simple installation
• Large, easy to use test/hush button
• Easy to mount twist-on base design
• Vermin resistant
• Interconnectable with FSA-60000 via FSA-50000 module, providing a complete hardwired and wireless install package (max of 24x combined FSA-30000 & FSA-60000 units interconnectable)