... Product Features:-Test voltage:0.5KV-10KV, variable continuously-Bigger output current, short-circuit current more that 5mA-Automatic calculation PI ( ... .-High anti-interference ability, can be used at high voltage sub-station-Automatic discharge after test finished. Operator can observe discharge process ... is designed based on Lead-acid rechargeable battery, 12V,4.5A. its size is 9.9 cm L,8.9 cm ...