SKU : R01001 Current Range Working voltage: AC 30~500V Measurement range:0.1~100A(ext CT) Display format lt;10A display such as:9.99A lt;100A display such as:99.9A ≥100A display such as:100A Accuracy: ±1% Error adjustment Step 1: long press the key (about 3 seconds) until the screen digit flashes, and then release the key; Step 2: Digital flicker means entering error adjustment state, and the digit cycle flickers in sequence: low digit position - middle digit position - high digit position - decimal point. The flicker represents the current adjustable digit, short press the key to adjust the value (Digital 0-9 cycle, decimal point shift); Step 3: long press the key (about 3 seconds) after the adjustment, the screen display PASS and return to the normal display interface, means the adjustment is successful.