... invation or delay the time of the invation while will not threat humans life at the same time. 2.Alarm ... are waterproof design, enlarge crawling electricity distance, guarantee it is not affected by the environment, climate and terrain when alarm. ♥ ... the panel, user gets it clearly♥ 5 LED indicated lamp, display the working mode clearly.♥ Equipped with12V, 4AH backup battery, convenient management ...