Acxico 1Pcs Resistance Box 0-9999.9Ω 5 Gears Adjustable Decade Resistor Resistance Lab Resistor Substitution Box

Junk, Junk, Junk. I was hoping for something usable to test fine resistor values in the field on led switch indicators. The values are mixed up on some positions, or are totally incorrect..with all selectors in the “0” position it shows resistance. Unit add value to the selected value. I guess you could use it as long as you test the value it is saying it is.. I don’t understand the culture, almost everything from China is junk. No pride in workmanship, only pride in getting money for nothing. It’s sad.

Everyone is right the directions are in Chinese but if you are wanting one of these and don’t know how to use it then you don’t need. I did take back off and put dielectric grease on contacts. I checked accuracy and is close on all setting probably 5% +/-

This is a bit lightweight and low end quality construction. Tolerance on values is pretty large but it's a useful substitution box for cheap. You get what you pay for.

seems pretty accurate. the binder posts are horrible...no hole for a wire cannot plug banana plugs into them the case should be 1 1/2 inches smaller mostly empty see pic but the big issue is the internal wipers are simply pieces of steel with rough dimples punched into them to make contact on the copper pcb. when I opened, after using for a couple test values, the pcb was significantly scratched with deep gouges into the pcb...steel wipers on soft copper... not good (see pic)...dont think it would last very long without mods. for the fun of it i modified the thing by drilling a hole in the dimple then wrapping 18ga copper wire around not fancy but now the contact is copper to copper and copper is better conductor than steel...it still marks the pcb but doesnt gouge it plus i added some contact lubrication in hindsight would use smaller wire now it works great should last longer

The resistance as read by my digital meter is not repeatable.....that is to say that if you set a resistance on the dials and take a reading then move the dials and re input the same settings again you do not get the same reading. (note: I said the same reading which in addition may not match the dial settings because of tolerances.) Looks pretty, but not functional for my application which requires repeatability. I would not buy this item again. Update: since I am an electronics guy I opened up the unit and found what I expected.......dirty switch contacts......cleaned them with "tuner cleaner" and the unit now works within tolerances.....getting the case screws out was a project.....very tightly torqued.....another indication that the supplier needs better quality control.

I am not going to rate this too low because it is the least expensive 0.1 ohm decade box available. However, this needs to be refurbished before it can be practically used. Open up the box and solder thick wire interconnects to the banana plugs. Then liberally apply silicone grease to the rotating contact areas and work it in. After doing this, they work fine.

Opened box and as it typical, I looked for the instructions. No English instructions to be found. Granted, It's a variable resistance box.... I know what it is and how to use it. However, if it's worth writing down in one language, it should be worth translating to English if selling into this market. Quick check of the resistances does appear to work ok. Pros: 1) Reasonable size for use 2) Self explanatory ease of use 3) Cost effective Cons: 1) Shipped with piece of metal flopping around inside (See picture of solder slag or something I found inside after opening up) 2) No English instruction manual 3) Very basic build A quick check with my ohm meter does indicate it does vary resistance based upon knob position. I'll withhold final judgment on overall quality until I've been able to use in a circuit and test appropriately.

inaccurate from day one. looking for a higher quality one now.