Rexel Momentum Extra jam free paper shredders are ideal for destroying confidential documents in the office. The P420+ shredder machine shreds up to 20 sheets of A4 paper (80gsm) in one go through the manual feed slot into P-4 (4x40mm) micro-cut pieces. Active sensing technology measures the number of sheets being fed in real-time to stop paper jams and misfeeds, indicated by a red LED on the control panel. This paper shredder will not operate until the number of sheets is reduced below or at the maximum sheet capacity. Designed for moderate to heavy use with a large 30 litre bin capacity and continuous run time and extra long run time of up to 4 hours.