The EX-10 Helios is the new flagship of the KO PROPO line. The faster CPU is 30% faster than the Mars R when in Advanced HSR mode. A new larger screen with back light has been added along with a jog dial for menu access. Two programable menu tables can be created. Six ring tone melodies can be programmed into this transmitter. Nine car model memory that is expandable up to 25 using the data pack option. PC interface option will allow you to up/down load settings and melodies. The new KR-302F three channel micro receiver is 25% smaller than the KR-301F receiver and is included.