The Detectur Sytem utilizes a Radio Frequency transmitter and receiver to detect motion of anything to which the transmitter is attached, with a range of up to 250 yards/meters.
 
System Contents:
1 battery powered transmitter.
1 double-sided tape for transmitter.
1 CR 2032 Battery and 1 spare. (Average battery life is one year.)
1 alarm (receiver) with USB cable and optional wall mount fixture. 
1 110v-240v – 50/60Hz AC/DC power supply for alarm.