Water dispenser, 3 sets

I bought this a few years ago because I was worried about my plants drying out when I was away from home. I used it for only one season and then stored it in a storage box. As shown in the photos, you set a plastic bottle, fix the tip of the hose with wire so it doesn't touch the soil in the pot. Water drips at a rate of about 1 drop every 2-3 seconds. The main body is plastic, and only the fixing screws are metal. It can be attached to unglazed pots, terracotta, sturdy thick plastic pots, etc., or any pot where you can fix it on the outside. The tip of the hose must be placed below the opening of the plastic bottle for the water to drip.
I was going to throw it away, but I thought someone might be able to use it, so I'm selling it for almost just the cost of shipping and fees.