RTS PS-20 Power SupplyThe RTS PS 20 is a Two Wire Intercom power supply. The PS 20 features two and four channel operation, RTS monitoring, two channel program input, audio linking, and three mode operation: RTS 2 channel, RTS 4 channel and Clear Com mode. It also has double the power output of the PS 31 per channel, which will increase the number of user stations and beltpacks which can be connected substantially. The PS 20 features two channels of communication where