1. Use oil-free lubrication vacuum pump, the negative pressure rises quickly, no oil pollution, and the pump body does not need daily maintenance
2. Other switches and power cords can be placed in the slotted flap at the rear of the device
3. An overflow protection function available to prevent liquid from entering the intermediate pipeline and the vacuum pump
4. The negative pressure system is adjustable according to clinical needs
5. The standard material of storage bottle is glass, but it can be changed to PC as you preferred