The M4M 20 multifunction meter is a versatile device designed for engineers. It features 2 digital outputs, 2 analogue inputs, and 2 programmable I/O for flexible connectivity. With Bluetooth and Modbus RTU communication capabilities, it can easily integrate into existing systems. The meter operates on an auxiliary supply of 48-240 VAC/DC at 50/60 Hz. In terms of accuracy, the meter meets the 0.5S class according to IEC61557-12 standards. It also offers a degree of protection with an IP54 rating, ensuring durability in various environments. The M4M 20 supports multi-measurements including currents, voltages, frequency, power factors, and timers. It provides metering for active energy, reactive energy, apparent energy, and 4 quadrants energy (Import/Export). This allows for comprehensive monitoring and power quality analysis through data recording and logs. With its graphic colour display and 5 pushbutton keyboard, the meter offers a user-friendly interface for easy navigation and configuration. It is designed for panel mounting with dimensions of 96x96 mm. Overall, the M4M 20 multifunction meter is a reliable and efficient solution for engineers seeking accurate measurements and advanced monitoring capabilities.