This is a battery-operated strapper that requires no seals or buckles & it tensions and seals polypropylene and polyester straps from 10 to 19mm wide in quick time. It is can be used in any position & it tensions, vibratory friction seals and cuts plastic strapping in one cycle. It has preset tension button that can increases the tension by 20kg, each time it is pressed. It is supplied with a charger & a 15.6volt rechargeable Ni-Cad battery that can recharge in just 15 minutes.