Olympia Alarms Wireless alarm system extension 626755 - Olympia 6109, The Olympia 6109, manufactured by Olympia, is a wireless alarm system extension designed for outdoor use. This device features a robust sounder, enhancing security measures for residential properties. Typical applications include its use as an external warning siren, adding an audible alert to deter intruders. Olympia 6109 Wireless Alarm Outdoor Siren: Compact Loud 105 dB IP54.