However, If you buying from serocity, then check the price of the transmitter alone, and the basic package with servos and all. Its $15 less to the 9CAS with the 8 channel PCM reciever and 4 S3003 servos and AA battery harness and a micro switch, than it is to get just the radio and the same reciever. Also, if you want the 600mAh 4.8V flat battery and the standard swtich, its still $5 cheaper than the radio and same receiver alone.