An extremely reliable Birth Alarm system with a transmitter and a receiver. In this version your mobile phone is the receiver, which means your range is unlimited. You will need a prepaid SIM card, and you only need to be in an area with a mobile signal.The transmitter is attached to the mares back in an anti roll girth and can be used both indoors and out. It will send an alarm or a message status to a maximum of four different telephone numbers. Delivery including anti roll girth. Benefit: The alarm can be received nearby and at a distance.