2007 Toyota Prius Owners Manual - Page 270

Push and turn this knob to step up the station band or to step down. Your radio automatically changes to stereo reception when a stereo broadcast is received. "ST" appears on the display. If the signal becomes weak, the radio reduces the amount of channel separation to prevent the weak signal from creating noise. If the signal becomes extremely weak, the radio switches from stereo to mono reception. In this case, "ST" disappears from the display. Type 1 26P197 26p260 Type 1 and Type 2 26p125 Type 3 Type 2 253