Audible Indoor & Outdoor Security Emergency Alarm Electronic Siren with Bracket The CEA-60 Electronic Siren is an audible alert unit which emits a 120dB tone when powered. It is an ideal solution for domestic security, both indoor and outdoor. The CEA-60 can be easily attached to a plug or battery, or hard-wired into a phone line/ standard telephone socket, to produce a loud alert – no mains power is required. The CEA-60 is a multifunctional DIY solution. With our easy to follow instructions, set up is quick and straightforward Compact yet Capable – The CEA60’s compact dimensions (approx. 11.3cm x 13cm) and 120-degree rotation mean you can easily position it as required. Highest Quality – All CEA Assistive products are manufactured to the highest standards.