"The voice control system snom PA1 complements existing SIP telephone systems with another component of modern communication. The snom PA1 combines telephone functionality with a powerful digital amplifier to transmit announcements and background music for assigned rooms, hallways and office floors. Announcement over snom PA1 is done simply by initiating a call from a handset, headset, or snom phone with hands-free mode. An efficient 4 watt amplifier is enough to cover an entire room or floor space."