WARNING!!!
1. DO NOT use in wet environment.
2. DO NOT connect the power meter to a multi-plug outlet to measure multiple electrical appliances at the same time, in case the total power exceeds the threshold of 1800W and cause a short circuit.
NOTICE:
WHEN POWER SWITCHED OFF AND BACK ON, IF THE POWER METER TURNS "0", IT MAY BECAUSE THE TESTING TIME IS LESS THAN 1 HOUR, OR TOTAL KWH LESS THAN 0.1 KWH. THAT'S WHY NO DATA SAVED.