Micro-proccessor inside. Photoelectrical control. No pollution. Low noise. Good binding effect. Technical Parameters: Power:220V/50Hz Consumption:900W Max binding length:420mm Max binding thickness:39mm Operation speed:150pcs/h(manual) 180pcs/h(automatic) Max binding size:L390mm×H420mm Min binding size:L86mm×H60mmMax cover size:L780mm×H420mm Melting glue time:30min Milling cutter:2 groups(including sun knives) Machine size:1440mm×610mm×1100mm Weight:150kg