I received this ZB2L3 battery tester from this seller and ran a test as usual when I received any electronic items. The set's display showed "0.06" after power up. I have a OEM set and it should showed "00.00". I queried seller about my concerns and I did not get any satisfy answers. The seller was not helpful. At the end I found cold joints on the board and fixed it.
Excellent product. I recommend the seller.