Battery operated photoelectric OUTDOOR detector (Range: 30m), 4 beam selectable frequencies. Long battery life (approx. 5 years). Requires LSH20 Lithium batteries manufactured by SAFT 3.6V, 13.0Ah (2 for transmitter, 2 for receiver). Battery saving timer function for wireless transmitters. Compatible with numerous wireless transmitters. (Batteries included).
Manufacturer does not take any responsibility of problems due to use of other battery models than those explicitly indicated in the manual.