The RMC-300A is a multi-functional remote control unit. Controls up to 24 Datavideo PTZ/block cameras with 14 presets/camera. Supports iOS/Android tablet (Not supplied yet necessary). Remote Control via Serial (8 ports) and 16 DVIP-ports. With its friendly UI, The RMC-300A makes it easy to set up and control cameras for any live video production, setting up the axis zoom by the knob and the axis pan/tilt by the joystick. USB port for firmware upgrade and tablet charging.