Technical Parameter Model:RCS-7040 Max. spring tension: 150mm Coil design: 1. 83m / 6" Range of Weight: 0.000-100.000 kg or 0.000-220.000 Ibs Accuracy: ±0.5% of Reading Resolution: 1g / 0.003IB / 0.04OZ Power Supply: 9VDC Operating Temp: 32F to 113F Platform Size: 223 x 223 mm(8-3/4"*8-3/4") Weight: 2.485kg (5.47oz) LCD Size: 67 x 23 mm LCD: 7 Digits Display Some Advantages of This Product Support a variety of pressure units: kg / pound / ounce. High precision: Accuracy is up to 0.001. The spring signal wire is used, and the maximum stretching length is 150mm, which is convenient for the use of the product. Packed in a thick case, it has a 360° anti-collision design, which effectively protects the product and facilitates product carrying. Package include: 1 x Refrigerant Charging Scale 1 x Carrying Case 1 x Coloured Box with Operating Instructions Attention: According to Amazon rules, you can return within 30 days after you received, but if it is over 30days, we only provide repairing. One year warranty