📱The TeyPhone KC4 is an updated version of the original TeyPhone KC1 from the 1950s.
🔊The main visual difference is the casing, with the KC4 being made of plastic and the KC1 being mostly metal.
🔧Internally, both models have metal components, but the KC4 incorporates more plastic for a modern look.
🔌The KC4 features an updated logo, while the KC1 has a more retro design.
🎵Although the KC4 is stereo-capable, finding stereo cartridges is extremely rare.