This product is used to detect various household appliances such as refrigerators, rice cookers, color TV sockets, and other industrial appliances, air compressor generator inverters, etc. and to detect various AC AC power supply voltages, currents, power charges, frequency, power factor, working time, and other parameters At the same time, you can also enter the product background to set the threshold parameter value of the low-voltage high-pressure alarm to monitor the voltage parameter in real time and the alarm to remind the user to the safe use of electrical appliances The setting of unit price of electricity bill is also very convenient and fast for monitoring and calculating the accumulated electricity bill Measuring AC voltage range: AC50 ~ 300V Measuring power range: 0 ~ 30KW (0 ~ 30 kW) Measuring current range: 0 ~100A Size: 85.7 x 63mm Colour:black Material:ABS Package Contents: 1 x AT24C 100A 2.4 inch Digital Voltmeter(Without Bluetooth) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.