> Two-wire and polarity-free: The system loop line adopts two-wire and polarity-free communication power supply technology without external power supply. Strong anti-interference, convenient wiring, improved system reliability and stability, easy construction and installation, reduced project cost, and convenient later stage maintenance

> Intuitive display: 480 × 272 4.3’’ LCD screen provides a highly intuitive interface, allowing the user to fully setup the system without the need of any external tool

> Ultra-long history record: Save historical events for a long time that can be inquired and printed in various ways such as time and type

> Intelligent power supply: With automatic switching between the main and backup power and the charging and discharging functions, it ensures the stable power supply of the system to the greatest extent

> Protection design: Short circuit, open circuit and overcurrent protection to ensure stable operation.