This is 40kg electronic scale. Which measures accurately. It measures minimum weight of 2gram and maximum of 40kg. This is used in a groceries, super market, bakery, and other outlet stores. This is high quality scale. It is rechargeable with a removable battery at the back of it. Both the bolt and nut sellers can as well use this for there measurement. It has up to 7 storage capacities. It's display is both front and back in the sense that more that one person can veiw it at a time to avoid over crowding and as well to allow the scale to maintain it's accurate reading. It's precaution is as follows: using of wet cloth to clean the scale. Avoid accumulation of dust to the scale. Do not expose to the reach of children. Keep in a normal room temperature. Do not keep under the rain to avoid the damage of the scale.