The AK-01 alarm contains an infrared motion sensor with a range of 60 degrees and electronics performing the range notification.
The infrared motion sensor (PIR) responds to infrared rays - for example body heat when entering the area of action
Mode I- notification when switching- music melody, can be select 36 melodies with a volume change button
Mode II - off
Mode III - incoming notification when passing - greeting
Detector range 3-7m (60º)
Battery - AAA 3x1.5V
Sound > 60db