This product is designed to detect issues in various household appliances like refrigerators, rice cookers, color TVs, and industrial equipment such as air compressors and generator inverters. It measures AC voltage, current, power load, frequency, power factor, and operating time. You can customize high/low voltage alarm thresholds in the settings to monitor voltage in real-time and receive alerts for safe electrical appliance usage. Setting the electricity bill unit price is quick and easy for monitoring and calculating accumulated electricity costs. AC Voltage Measurement Range: AC50 ~ 300V Power Measurement Range: 0 ~ 30KW Current Measurement Range: 0 ~ 100A Size: 85.7 x 63mm Color: Black Material: ABS Package Contents: 1 x AT24C 100A 2.4 inch Digital Voltmeter (Without Bluetooth)