BT-OS 280... Mains supply 230 V | 50 Hz Power 280 W Oscillating speed 0-12000 min^-1 Oscillating circuit 2 mm Sanding area 227 x 115 mm Sandpaper size (clamp connection) 280 mm x 115 mm Sandpaper size (velcro strip) 230 mm x 115 mm