... 2. Item no:AD-2006B 3. Master Station size:150x80x63mm 4. Substation size:68x18mm 1. Specification: Model No.:AD-2006BdescriptionSlap-up two way ... company,ticket office,hospital,office,factory and so on.7. AD-2006YY has melody output function: 1. Hello Welcome! 2.Thanks ... and new friends around the world. Durable Bank Window Intercom (AD-2006B)