AFTER LEARNING THIS SECRET, you will never throw away A USED SYRINGE again!

A practical tool from an ordinary syringe.
A great idea that should be done with your own hands and save money.
After learning this secret, you will never throw away the syringe again.

[@KORZDAKRA]

very nice 👍 my friend ❤️

[@renomotlex]

Right on! Now I can test for continuity and get a paraphernalia charge...and maybe some hepatitis, too!

[@addodiy6523]

Hi! It turned out to be a good and easy-to-manufacture device, with a pretty good measurement range, from 9 volts to 20 volts (the main thing is not to keep it for a long time so that the LEDs do not burn out)