1. digital display: Voltage, current, power, frequency, power factor, active energy, timing, and other electrical parameters are displayed on the same screen, making it easy to see and view in real-time. 2. High definition TFT color screen: The 0.96-inch high-definition TFT color screen has a wide viewing angle and high contrast, making it easy to read even in dim indoor environments. 3. Mobile remote control: WiFi networking, cloud remote. A mobile phone is a remote control that allows you to control devices anytime and anywhere with a signal. At the same time, multiple sets of timed data can be added, and power on can be set to save time and effort. 4. Standard guide rail slot: The product is installed using standard guide rails, without the need for screws or fasteners, making installation convenient and easy. 5. Portable and easy to install: The product is compact in size, convenient to carry, and can also be used in distribution boxes. The wiring is also very simple, and it can be easily handled without the need for an electrician. 6.Wide range of applications: widely used in high and low power distribution cabinets, factories, warehouses, companies, shopping malls, home and other fields. Parameters: Product Name: Rail Voltage and Current Meter Model: KWS-303WF Voltage range: AC100-290V Current range: 0-40A Power range: 0-12KW Timing range: 99 days Electric energy range: 0-9999KWH Temperature range: -20~150 C Frequency range: 50-60Hz Power factor: 0.00-1.00PF Power off memory: Yes Overvoltage protection: Yes Undervoltage protection: Yes Timer switch: APP end Screen brightness: Yes Screen Flip: Yes Battery reset: Yes Timer reset: Yes Product size: 8.2x5x2.4cm Curve Chart: APP/PC Color: As shown Material: plastic Package Contents: 1*KWS-303WF Power Meter 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.