... professional processing. With 9 colors you can choose ROHS 328A Wired Base for Retro Handset1, Fit for most of the 3 ... , can be used match with all our 3.5mm retro handset, and the other 3.5mm connector equipments. The switch button ... , 5 colors available: black, yellow, pink, blue, red. Radiation Retro Handset