water can siphon back from the reservoir into the air pump which will almost certainly cause it damage
-Data transmission security adjustable from normal to encoded
An electrical feed to the fan is required which can be directly from the mains or via a fan-speed controller
such as PMT Not only is it cheaper
Target zone indicator• Built-in Day/Night auto detection to override CO2 control
ONA Block Pro Odour Neutralising Agent, 175g Block water can siphon back fromOna Block Pro The ONA Block is ideal for small areas such as closets, foyers, attics, cars, gym bags, boats, kitchens, garbage cans, cupboards or vents. Simply remove the cap, or punch several small holes in the cap and place in desired location. The ONA Block measures 3" x 3" and will fit in most places. The ONA Block will release its powerful odor neutralizing agent and keep the location free from undesirable odors. Replace as necessary