Update 4/10/20 end of school year and these balances are great for the money.These held up fine with 9 and 10th graders using them. I recommend them.---------------------I am using 3 units in a small private school high school chemistry class I teach. .01g/1000gCan't beat the price. Accurate and works fine for high school chem labs.500g calibration mass was included which is nice.User 'manual' is useless, but I kind of expect for items like this from China where they don't speak English so good (so well?). Its not complicated, you can figure it out easily.