This is a new unused item although the box has been opened. I got this and then didn't need it but it was to late to return it. My forgetfulness is your benefit! Here is the information from the original seller about the item:
【AUTOMATIC
SWITCH】: LHUKSGF automatic swimming pool cover pump is fully automatic
operated. It will automatically turn on when water has been detected at
2". When the pool cover pump remove water to approximately 2/5", it will
turn off.
【GREAT DESIGN】:The submersible water sump pump with strainer base
protects the pool cover, filters debris and keeps the drain pump stable.
The swimming pool cover pump with a filter basement can be easily
cleaned without tools. The built-in thermal protector protects your
swimming pool cover pump from damage.
【REMOVE WATER EASILY】: Our automatic pool cover pump moves up to 1200
gallons per hour（When not connected to the garden hose）. Bottom suction
design can remove water down to 3/4". Great for removing water from
pools, pool covers, tarps, window wells, hot tubs, boat covers,
rooftops, spas and more.
【EASY TO USE】: 3/4" NPSM discharge with 3/4-inch garden hose adapter
included to fit standard 3/4 garden hose, convenient 25-foot power cord
ensures easy-reach of power source in most installations.
【WHAT YOU GET】: Package includes pool cover pump, a 3/4" barb elbow
adaptor, a 3/4" threaded elbow adaptor, a mesh bag and a manual.
Shipping will be free in the US.