① Battery: two pieces of button batteries (please attention the polarity).
② Insulating strip of battery: to cut off the power to longer the usage of battery when the sensor will be halted to use; it can be used once removing the strip.
③ Alarm/ Low-power indicator: when the product was triggered and making alarm, the indicator lights on 2 seconds and turn off circulating; when the product is on the status of low power, the indicator is on weak light to alert the user to replace it with the new batteries.
④ Magnet: realize to make alarm by cooperating with the switch.
⑤ Installation arrows: to assure the two arrows close and align when installing.
⑥ Guiding lighter: derive the light of the Alarm/ Low-power indicators.