One Control OC10 Crocodile Tail Loop Audix Features Controller: Playback knob to Arista Features Controller: Playback knob to adjust speed Power button switch for controller Infrared shutter photography key Memory button Focusing knob Unique Memory Function The four memory focus can be switched out of order Follow focus adjustment key flexibly adjust tje speed of follow focus Wireless transmitting distance of 300M Receptor: Power buttong Each card is individually measured with a precision spectrophotometer to certify that it meets or exceeds stringent specifications The OC10 has 7 programs per bank and you can choose up to 10 programs for each program The OC10 can also be a simple switcher by accessing the direct mode