This is the DuraTrax 75MHz (channels 61-90) Radio Frequency Checker.
This is a Sheet of 1/4" Latex Foam Rubber from Hobbico.
This is an Air Alert Flight Pack Monitor used as a Low Voltage and Lost Aircraft Alarm on Radio Controlled Aircraft.
This is the Futaba MSA-10 Servo Synchronizer. Ideal for Giant Scale Models that require multiple-servo control.