It applies VVVF speed regulation technology.  It largely reduces power supply capacity.  Compared with traditional AC double-speed technology, it saves nearly 40% of energy.  It cuts down the elevator power-consumption to maximum extent.  Therefore, freight elevator becomes forerunner in its developing orientation of speed governor technology.  No matter load is heavy or not, it can adjust the elevator speed, get the constant torque characteristics.  It greatly improves the comfortable elevator operation, leveling accuracy.  It lowers down the running noise.

Currently, Careston freight elevator applies modular micro-computer collective-selective control with wide application.  It features as simple programming, stable and convenient operation, easy installation and debugging, nice repair / maintenance etc. with quick responsive speed, short waiting time.  Digital floor appears elegant and graceful.

Careston applies advanced infrared ray door protection system.  It sensitively reacts to any person / object that enters into the probing area.  If ray of light gets disturbed, it quickly re-opens without damaging passengers / goods.  It thus ensures that both passengers and goods safely enter into / exit form the elevator.