This oven does not hold a vacuum without a pump on it constantly.
The temperature controller of this oven is useless, temperatures rise and fall uncontrollably.
This oven came with zero instructions.
IF YOU’RE PLANNING ON USING THIS TO MAKE ANY TYPE OF CANNABIS EXTRACT DO NOT BUY.
Arrived filthy, had obviously been used for some industrial processes and returned, unit was supposed to be brand new.
Zero customer service, total rip off. Amazon should give these guys the boot.

Marginally packaged in typical low-grade Chinese corrugated and foam board. Door was detached, bracket bent but was able to bend back and reattach door, I assume the door was originally in place but got knocked off in shipping. Small dent in oven corner wall.

Took some fiddling with the door latch to get to seal properly, but holds a very high vacuum with a similar low-end pump. Takes a bit of persuasion to get the door to release after vacuum is bled off. Temperature control is good. Holds vacuum for at least 4-5 hrs with pump shut off and valve to pump closed.

Using this oven to dry small quantities of plastic resin pellets (PLA, PET etc.) and 3D printer filament.

This product is trash. Cane with instructions for the PID. Leaks air. Not pleased at all. Seller will not call you or email you back.

This compact drying oven does not perform as expected: the expected temperature at 250C cannot be reached even with the setting at 300C for more than 2 hours.

Very nice unit, well packed, arrived with no issues, works as expected. excellent machine, well thought out. well made. and well executed in its design. Simple, easy to use and straight forward. The epitome of what machines should be.

Pretty good vacuum oven for the price, however, the temperature controller is not very accurate. Needed to offset the reading it first, such that now it is only accurate in the range we want to use it. Black knob (on left side of oven) to bleed in air helps to adjust vacuum but replacing it with a better valve gives much better results.