alari sensor: 1.most reliable monitor through day and night 2.high sound volume alarm 3.Battery powered 4.no wiring required

 Specification:

Power: DC9VDetecting distance: 7m(max)detecting angle: 120°Operating temperature: -20°C~40°CRelative humidity: <93%RHdetecting moving speed: 0.6~1.5m/sstatic current: ≤40μAalarm current: ≤100mAalarm time-delay: 20~30secalarm volume: >70db

Important:

The unit should be checked by walking test periodically to assure proper operation. lf the unit does not work properly, immediately replace the batteries and retest the unit.Remove the batteries when use not required for a long period of time.No block is allowed between the unit and desired area of detection.The unit and its detection area should not be exposed to direct sunlight, heaters, electric fans, etc.The interval between the first induction and next induction should be 5sec.

small white alarm sensor