1,suit for some special area with intensive rebar, narrow constructive square, while large vibrator could not be used.
 2.help to save dosage of concrete.
 3.make the interior combination of concrete more balance and tight.
 4.shorten the time of concretion, quicken the construction progress.
 5.big vibratory force, durable life span. 
Tips:the listed detail of configuration are available, depending on your favor.
Case color, motor power, enameled wire material, etc.