Description Practical Function: This product helps you determine the cost of your standby appliances, the power factor, whether appliances are actually charging, and how long your appliances have been charging. Saved Data: Built-in battery to retain memory settings and store electricity even during power outages. Don't worry about data loss due to a sudden power failure. Separate the electricity meter from the outlet to carefully read the parameters. Money-Saving Helper: Use this electricity meter to monitor real-time consumption, current, and electricity cost of your electrical appliance, helping you save energy and money. Easy to Use: Easily measure the power consumption and cost of your electrical appliances. Simply plug the meter into the wall and then plug your appliance into the meter.