Automatic transfer and restore function for seamless operation. Under voltage and loss of phase detection for enhanced safety. LED indicators on the panel clearly display the working status of the controller. Applicable for 2 isolated neutral lines. Mains normal delay and generator normal delay configurable via potentiometer (range: 1~60s), with strong anti-electromagnetic interference performance and modular design. 1. Mains is unavailable; if any phase voltage falls below the minimum working voltage or a phase loss occurs, the genset will be started. 2. Output contact capacity of mains and generator transfer relay is 16A AC250V, which can directly drive switch conversion. 3. Output contact capacity of GENS START relay is 16A AC250V, featuring volt-free normally-open/normally-closed contact. 4. The controller is designed with a self-extinguishing ABS plastic shell, pluggable terminal, and compact structure. 5. Internal 35mm guide rail mounting for easy installation. Color: As Shown Material: plastic Package Contents: 1*HAT320 automatic controller 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.