Ajax HomeSiren Jeweller, wireless siren, with connection for external LED, adjustable volume: 80 to 100dB, delay/security mode change indicator, connection for an external LED, adjustable alarm duration: 3 sec. to 180 sec., notifications when door is opened, radio range up to 2000m, up to 5 years battery life, siren tone frequency 3.4kHz, incl., 2x CR123A batteries (pre-installed), SmartBracket, connection for LED display, mounting kit, quick start guide