The Aiphone DAK-2S dual master adapter kit contains two component modules to expand a door intercom system to accept an additional master station (sold separately). The kit works with the Aiphone C-123L/A, C-123LW, LEM-1, LEM-3, and LEM-1DL master stations (sold separately).

Aiphone manufactures intercom systems for residential, business, and healthcare structures. The company, founded in Japan in 1948, has its North American headquarters in Bellevue, WA. Aiphone meets International Organization for Standardization (ISO) standards 9001 and 14001.