Features: There are 3 types,EU/UK/US standard, selecting based on your region. Current test: 0.10-20.00A, accuracy to 0.01A, error 0.5%. Voltage test: 0.000-4.500V (low pressure) accuracy to 0.003V, error 0.5%; 4.50V-30.00V(high presure) accuracy to 0.01V, error 0.5%. Capacity test: 10Ah, the resolution of 0.001Ah; 10Ah-100Ah, the resolution of 0.01Ah; above 100Ah, the resolution of 0.1Ah. Connection: four-wire detection, voltage and current channel separate wiring, to ensure measurement accuracy. Specifications: Material: Alloy Size: 19x15x10cm/7.48x5.9x3.93in 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 Battery Capacity Tester