1> Power: 2 AA batteries (without); 2> weighing units: two kinds of unit conversion、 grams (g)、 ounces (oz) 3> Packing: Color box; 4> largest weighing: 5000 g (5 kg); 5> Minimum accurate weighing: 1 g; 6> accuracy: accurate to 1 g; 7> Standard deviation: plus or minus three thousandth minimum display unit; (items such as weighing 3000 g maximum error of not more than 3 grams) 8> Other features: automatic shutdown feature is not used;