Product Model BT-54A BT-54B BT-54C Current 60A 40A 60A Rated capacitance 32-195AH 10-150AH 32-195AH Battery voltage 6-12V 12V 12V Test speed 5S 5S 5S Display mode Pointer Pointer Pointer Housing material stainless iron stainless iron stainless iron Dimensions 200*110*40mm Weight Approximate 0.75kg 1. Before using it, please carefully check whether the pointer of the device is at the "0" position, if not, please rotate the zero regulator to adjust the pointer to 0 position.2. Ensure that pressing the test switch for less than 5 seconds when check the device.3. The battery can't be detected when the liquid is insufficient.4. In series connection of 12v and 24V circuit during testing is prohibited.