It indicates the refill is low or battery power is low, Please check both & change as needed.

Yes, both units are interchangeable and can installed on either a urinal or toilet fixture.

AD-106 , AD-107, AD-108, AD-109 are all suitable for aerosol fragrance refill.

AD-305 , AD-306 are all suitable for non-aerosol fragrance refill.

Filling one pack concentrate refill into the container then diluted with water.
That's all. It supplies foaming soap now.

No, the material of fragrance dispenser is P.P.(polypropylene) and never corroded by the refill except (semi) transparent window.

They are all support 3000 metered sparys.

We strong recommend choose alkaline battery for longer operation and stability.

Yes, there are three positions (Heavy , Midium, Light) on the collecting place for adjustment.

About 3~4 cm.