I've obviously never used this so I'm not even sure how it works. However, if it's like a similar one that I have, the little hand pump is used to get it started without having to suck liquid up using your mouth.
LARGE Automatic Syphon Kit - Pump Tube 64cm - Beer Wine Home Brewing
Tyenaza Automatic Pusher Glide Shelf, Labor Saving Stabilizing Damper Adjustable Divider Automatic Drink Propeller for Refrigerator Supermarket (Blue)
Tyenaza Automatic Pusher Glide Shelf, Labor Saving Stabilizing Damper Adjustable Divider Automatic Drink Propeller for Refrigerator Supermarket (White)
Glue Liquid Adhesive Dispenser, Semi-Automatic Fluid Glue Splitter with Foot Pedal & Fixed Bracket, Minimum Glue Drop Volume 0.01ml and 1-30s Automatic Timing, for Optics, Jewelry, Machinery
CHANGLKJ Glue Liquid Adhesive Dispenser, Semi-Automatic Fluid Glue Splitter with Foot Pedal & Fixed Bracket, Minimum Glue Drop Volume 0.01ml and 1-30s Automatic Timing, for Optics, Jewelry, Machinery
Glue Liquid Adhesive Dispenser - Semi-Automatic Fluid Glue Splitter with Foot Pedal, Fixed Bracket, 0.01ml Minimum Volume, 1-30s Automatic Timing for Optics, Jewelry, Machinery
