Features: Made of high quality electronic components, it is solid, durable and good performance, long service life. It can set active power threshold, and it will alarm when the measured active power exceeds the threshold. With reset energy, which can be used to reset software. Its communication interface is RS485. High precision, fast response and stable communication. Comes with a shell to protect the module. Communication module only, other accessories demo in the picture is not included! Specification: Material: Electronic Components Optional styles: A/B/C/D Voltage measuring range: 10-100V Min. measuring current/power: 10-100A Size: app.7.8 x 3.7cm/3.07 x 1.46in Shell color: Green Quantity: 1 Set Note: No retail package. Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 x Communication Module 1 set x Parts