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Feature

USB Rechargeable Automatic Pump, Never needs batteries, Quieter than most powered pumps
Comfortable silicone donut for airtight seal. Two included., Cool blue display shows how much suction and how long you have pumped.
Controller's 4 speeds increase and decrease pressure, Rubber o rings at top for tighter seal
Chamber is 8.25" tall, 2.5" wide, Pressure release valve, Easy on/off button, USB cord included
Top removes for easy charging, does not look like a toy. , Easy clean-up, 3 hours for a full charge, Runs for as long as 90 minutes on a full charge