Features: 1. Supports And Alexa Language Control Switches; The Clamp Ring Supports Two-Way Measurement (Supports Measurement Of Power Consumption And Power Generation) 2. Support Hour, Day, And Month Dimension Viewing, And The Option To Compare Consumed And Generated Energy Data; Current, Active Power, Voltage, Frequency, Power Factor And Other Real-Time Data 3. 10A Thousand-Node Output, App Controlled Switch; Supports Cloud Schedule, Does Not Support Local Schedule 4. Overcurrent And Overvoltage Protection (App Can Set The Value); Settings Are Saved When Power Is Turned Off. 5. Support Ota; The Opening And Closing Clamp Ring Supports 120A Description: Function: With Cut-Off 120A Note: Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use Energy Meter size: About 46 x 46 x 18.7mm Material: plastic colour: As shown Package Contents: 1 x Wifi Energy Meter 1 x Transformer 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.