Features: brand new and high quality DY4100 with LED LCD screen, potenial po le, grounding po le, current po le, voltage po le ect. More complete functions, higher accuracy, more convenient and reliable for operation and more suitable for outdoor use with dust and wet proof structure. DY4100 Digital Ground Resistance Tester can test earth resistance of various earth systems including power systems, electric equipments, conductors as well as resistance value of low resistance conductor and AC voltage test. Earth Ground Resistance:0/20/200/2000. Earth Voltage:030V +/-3% + 5. Specifications: Material: ABS Resolution; 0.01 Ground voltage: 0-30V +/-3% + 5. Date keeping Functional symbol display Automatic measuring range Low battery warning Power supply: AA 1.5V x 6(UM3) 12V x 1 (excluded) Note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Resistance Tester