Ajax StreetSiren DoubleDeck Jeweller, wireless siren for indoor and outdoor use, deters intruders, attracts attention, configurable alarms, alarm volumes from 85dB to 113dB, alarm duration from 3s to 3min, up to 1500m wireless connection, Jeweller and Wings communication technology, tamper-proof, easy installation and setup, up to 5 years battery life, incl., SmartBracket mounting plate (1x mounting screw), 4x CR123A batteries (pre-installed), mounting kit, quick start guide