GST200N is single loop panel, possible to be expanded the 2-loop version GST200N-2. They are suitable for small buildings like office, restaurant, store, shop, etc., provide simple installation, operation, and easy maintenance. Wide range power supply, 100-240VAC, 50-60Hz. Max. 30 zones. Each zone has its own alarm and fault/disable indicator and a label. Capacity 235 addressable devices. Optional expanded to 2 loops, 477 loop devices. Compatible with GST intelligent and digital products. 8X18 characters LCD screen. Non-Volatile memory ensures the data does not loss even if power supply is accidentally removed. Hong Kong version.