Talkaphone ETP-EL12/24 12/24VDC LED Blue LightTalkaphone ETP EL12 24 12 24VDC LED Blue Light Outdoor Beacon with Continuous Illumination and Triggered Flash The Talkaphone ETP EL12 24 is a rugged, outdoor rated LED blue light beacon designed to draw immediate attention to critical locations such as entrances, call points, and safety zones. This model operates on 12 24VDC and is engineered to stay continuously lit for high visibility, while also flashing when activated by any Talkaphone call