How to choose light-sensitive ( LS) and LCD dispensers? According to the indoor light intensity, the LS can be selected from day, night or all day. The scent frequency is fixed, and you can choose to deliver the scent every 5, 10, 20, 30 minutes. The setting of the LS is simpler and more convenient. The LCD's working mode can be set from Monday to Sunday, the daily working time from 00：00 to 24：00, and the frequency of delivering. Programmable operation, More energy-saving, to meet the fragrance spray requirements of different places, more commercial use. HOW TO USE - Can be wall mounted or used freestanding. (1) Place the dispenser in the location to be mounted, make a mark on the wall surface through the 2 mounting holes. (2) Drill the holes at the marks and insert the anchors. (3) Place the unit on the wall and affix the screws. (4) Ensure the dispenser is mounted securely on the wall. (5) Insert 2 pcs 1.5V D size batteries and the air freshener can. (6) Press the ON / OFF switch. (7) Set your preferred interval spray time. WHAT’S IN THE BOX 1 x Aerosol Dispenser, 1 x key, 1 x Installation Screw Set, 1 x User Manual NOT INCLUDED Batteries，Spray Refill Can.