AUTO-POWER-OFF This fountain pump has Auto-Power-OFF function, it will shut off the power when there is no water and restart after adding water, that can protect this water feature pump from burn out, ensure the pumps service life. FOAM FILTER Pump comes with a filter, it blocks leaves and debris from entering the pump, protect the pump from clogging. STRONG POWER & QUIET OPERATION This submersible water pump built-in pure copper motor, more powerful and durable. It s ultra quiet, running at a whisper level, produce no noise, giving you a quiet environment. ADJUSTABLE & DETACHABLE The pump has an adjustable knob to control the water flow, you can easily get a right pumps pressure. This pump is detachable, you don t need any tools to detach it, easy to separate, easy to clean.