The universal transmitter delivers long-range wireless power to any open/close, dry contact sensor. It integrates our hi-power transmitter inside a rugged, weatherproof housing. Ensuring a powerful signal to the tattletale alarm system, up to 3,000 feet away depending on structures between the base unit and the transmitter. It’s tamper proof to prevent unauthorized opening. Powerful magnets can be added to allow attachment to any metal surface. The included 3.0V lithium battery will provide power 2-3 years.