S2068 Wheel balancer 1)Automatic Start/Stop 2)Automatic distance and wheel diameter measuring 3)Self diagnosis 4)Self calibration 5)Interchangeable between grams and ounces 6)Interchangeable between millimeters and inches 7)Protection cover 8)4 ALU functions for light alloy wheels 9)Full screen display for a. B. D. Reading Power supply: 110V/220V1ph 220V/380V3ph Motor power: 185 320W Balancing speed: ≤190r. P. M Balancing Precision: ±1g Rim diameter: 255 615mm(10"-24") Rim width: 40 510mm(1.5"-20") Max wheel weight: 70kg Noise: <70dB.