Why KOIO Electric chain hoist sell so well all over the word

Why KOIO Electric chain hoist sell so well all over the word, which has following features say it;

 Features of KOIO Electric Chain Hoist:

    Shell: High tensile alloy steel,  Sealed design, Excellent heat eliminate, which make it excellent suitable in poor operating conditions.   
  
     Reverse phase protection device: which can cut down the work to protect safety of operator, if wiring incorrect connection.    

     Limit switch: Both lifting and dropping are protected with limit switches, to prevent to exceed limits.    

     Control voltage: 24V, 36V, 48V, low voltage, safety control.