Heinrich's IP-HS25/T IP/SIP Horn Speaker is designed for outdoor environments. It allows users to remotely warn off Intruders before they commit a crime, to deliver instructions during an emergency or to make general Voice messages. The SIP speaker also supports to play a pre-recorded audio file manually or automatically in response to an alarm event. Open standards support easy integration with network video, access control and VoIP (supporting SIP). IPHS25/T is a standalone unit that can be placed almost anywhere, which supports a flexible, stable and Cost-effective approach to system design.