for Hire in Blacktown and Sydney. The three-part modular system consists of the backpack, with integrated converter, removable/replaceable battery and internal vibrator.  The battery is easily inserted into the converter backpack and because there is no cord, the operator has flexibility and mobility to move around the job site.  The backpack system was developed by a leading backpack manufacturer and offers excellent weight distribution, as well as lightweight fabric, adjustable and padded straps for comfortable, extended wear.  The electric motor is maintenance-free, saving time and money.  The vibrator provides high-cycle/high frequency performance for effective consolidation of vertical structures and slabs.