... lift transports monitor with a rack and pinion, NON-conveyor belt, to keep the movementmore steady and itself more durable; 3 ... the LCD Monitor lift has 5 buttons, which are used for manual control (from left to right): Horizontal rotation; Vertical rotation, Pause ... -up, Lift-down.2. Remote control3. RS232, RS485 controlYou can control the LCD monitor lifts working as individual, group or whole ...