Thank you for looking. This is a set of Aiphone GBM-2M (indoor monitor) and GB-DU (door station). ■ Operation confirmed ■ Initialized ■ Short usage period, low usage frequency ■ Beautiful item with a clean exterior It was used without any problems until it was removed. The condition is good. As this is a used item, please only purchase if you understand its condition. Immediate purchase is OK. First come, first served. Thank you. We currently have 5 sets available. Bulk purchases are also possible.