VARIABLE SPEED JOY STICK; VARIABLE SPEED ROCKER SWITCH; VARIABLE SPEED POTENTOMETER; SHOT MEMORY: 23; BACK UP: RESERVED FOR MORE THAN 5 YEARS ( LITHIUM BATTERY); 2 AUXILIARY RELAY CONTACTS FOR CONTROLLING ACCESSORY EQUIPMENT AT THE PAN AND TILT HEAD; POWER CONSUMPTION: 5W;POWER SOURCE: 120-240 AV VIA 12V DC ADAPTER