$50 · On hold message module

Promotion-On-Hold. Module (For RCA 25403, 25404, 25413, 25414, 25415 & GE 25403RE3, 25404RE3 phones Skutch CK-7 Promotion-On-Hold Module for the RCA 25403, 25404, 25413, 25414 and 25415 four line telephones. The CK-7 supplies Promotion-On-Hold whenever any call is placed ON HOLD with the telephone's hold button. The CK-7 can be installed on any one of the compatible telephones and is accessible from all compatible telephones that are connected to the same telephone lines. Other makes and/or models of telephones can be used with the CK-7 but they will not produce Promotion-On-Hold when placed ON HOLD.