Automatic Aerosol Dispenser with Smart Chip 1st switch: Move this switch can adjust dispenser spray interval time, it has 3 interval spray time: 10/20/40 minutes 2nd switch: (caution: please ensure the spray nozzle away from your face and eyes); when you move the switch from off to on, the dispenser will spray 1 time after 4 seconds delay Power on and enter 24 hours working function Day: the dispenser will enter day spraying function Sensor: light sensor LED: red and green dual color When you move the switch from off to on, the LED will flash red and green for several times, then enter into normal working condition, the LED will flash green color Specification: Material: ABS, POM Unit weight: 370g Dimension: 22.5 x 12.5 x 8.5cm Batteries: 2 x AA batteries Spray interval: 10, 20, 40 minutes Controller: micro-controller Installation: It is recommended that the dispenser be installed high on the wall (above 2.0m) to avoid the sprayed aerosol coming into contact with passers-by and to reduce the risk of vandalism Open the front cover from right to left Hold the back plate to the wall and mark the hole positions, then drill for the screws and plugs provided and fit the dispenser to the wall Package includes: Dispenser: 1 unit Fix screws: 2 units Expanding plug: 2 units