Self-watering: With this drip controller, you don't need to worry about flowers or plants for a few days, just insert the spikes into the potted plant at the root Switch Adjustable: With a slow release control valve switch, plant watering spikes can control flow rate, Controllable drip rate from 2 to 30 drops per minute Easy to use: Without no tedious installation, just cut a hole in the bottom of the bottle and tighten the drip irrigation devices, then insert it into the ground Environmentally friendly: it s It's about reusable water spikes, find an old bottle of suitable size (like drinking water bottles) for self watering spikes, no need to throw it away somewhere, which helps create an eco-friendly environment Applicable environment: The watering device delivers water directly to plant roots, suitable for most plants. Easy flow control means your plants get the right amount of water Scope of delivery:Bee control equipment*12 Warm tip: Dear buyer, due to lighting effect, monitor's brightness, manual measurement etc, there may be some slight differences in the color and size between the photo and the actual product. Sincerely hope you can understand! Thank you!