Reinforced material, all-round buckle design, stable installation, and the card will not break. Processor requires one intelligent data calculation, which is simple, convenient, and fast. Application scenarios: Save time and worry. Use electricity rationally. You can measure the power, current, voltage, power factor, and energy of electrical appliances connected to it. You can clearly see the electricity usage. Operating Instructions: Click the M button to switch between displaying power and electrical energy. When on the electrical energy display page, press and hold the M button for 3 seconds to clear the accumulated power. Power supply voltage: AC 50-300V Current: 0-100A Measuring voltage: AC 0-500V Power: 0-50KW Power factor meter: 0.00-1.00 PF Electric energy: 0-99999 kWh Color: black Material: plastic Package Contents: 1 x display tester 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 to be slightly different from the real thing. The measurement allowed error is +/- 1-3 cm.