Features: Accurately measure 5A/20A/30A current safely with Hall effect noncontact detection, eliminating direct circuit contact risks while maintaining precise in ACS712 Current sensors Module applications. Current sensors chip: ACS712ELC-5A / ACS712ELC-20A / ACS712ELC-30A;There is three specifications for the product 5A/20A/30A. You can choose the specifications according to your need;Pin 5V power supply, on-board power indicator; The module can measure ranges 5/20/30amps, corresponding to the analogs output 100mV/A; No test current, the output voltages is VCC/2 Optimized for battery management systems, motor controls, and energy consumption analysis in intelligent devices, robotics, or power supply diagnostics. Specifications: Component:Plastic Size:Approx.31.4x13mm/1.24x0.51inch Working voltages: 5v Option Current ranges: 5a/20a/30a Package Includes: 2pcs ACS712 Current Sensors Module note: Please allow 1-2cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.