RetroRadio Compatible with 1983-85 Porsche 944 LAC-M1-502-06-76P6. The Motor 1B feature set includes an AM/FM RDS tuner with 30 presets, a built-in 275-watt amplifier (18-watts RMS/40 peak x 4 channels), and built-in Bluetooth® for hands-free calling and high-quality audio streaming.