1.DY4100 Digital Ground Resistance Tester can test earth resistance of earth systems including , electric equipments, as well as resistance value of low resistance conductor and AC voltage test. 2.This one has more complete functions, higher accuracy, more convenient and reliable for operation and more suitable for outdoor use with dust and wet proof structure. Feature: Color: as shown Material: plastic 1.Earth Ground Resistance:0/20/200/2000 ?? 2.Resolution;0.01 3.Earth Voltage:0-30V +/-3% + 5 4.Data Hold 5.Function symbol Display 6.Automatic range 7.Low Battery Warning 8.Power: AA 1.5V x 6(UM3)12v x 1(not include) 9.Size:150 x 100 x 70mm 10.Weight: . 680g Package Contents: 1 Set x DY4100 Digital Earth Ground Resistance Tester 2 x auxiliary earth bar 3 x testing wire(red 15-meter testing wire/yellow 10-meter testing wire/green 5-meter testing wire) 2 x simple testing wire(red 1.6-meter testing wire/green 1.6-meter testing wire) Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.