The RF-P50 has a convenient slide-rule tuning dial on the side of the unit for easy, one-finger FM/AM tuning. It also has a tuning indicator LED to help you find out when a station is properly tuned. The RF-P50D is a pocket radio with comfortable station setting through the slide rule of rotary knob on the side Radio tuner for FM/MW reception LED tuning indicator, battery operation, including hand strap.