Loud 135db Keypad Motion Sensor Alarm Siren for Garage, Shed. Portable Cordless Battery Operated Travel PIR Motion Detector Alert. Indoor USB DC Powered Infrared Home Security System for Door, Window June_2023_update necessary for areas with frequent

necessary for areas with frequent power outages

it is eay to carry

Laboratory and users

The lens distance scale can be used as well as the focusing to infinity and the adapter has correction lens inside

Loud 135db Keypad Motion Sensor Alarm Siren for Garage, Shed. Portable Cordless Battery Operated Travel PIR Motion Detector Alert. Indoor USB DC Powered Infrared Home Security System for Door, Window June_2023_update necessary for areas with frequentLoud 135db Keypad Motion Sensor Alarm Siren for Garage, Shed. Portable Cordless Battery Operated Travel PIR Motion Detector Alert. Indoor USB DC Powered Infrared Home Security System for Door, Window Product Features Simple Keypad Motion Sensor Alarm Once the alarm is triggered by motion detected(If the PIN CODE is not entered timely in 5s), then device will sound loudly and last 30s. It is a great additional Indoor Cordless Infrared Home Security