B34 Professional Cross-cut Shredder uses Energy Management and Control System to reduce energy consumption by 90 percent. Cross-cut shredder automatically switches to energy-saving mode in 2 minutes after last use and switches off entirely if not used for 4 hours. Temporary mode is designed for small shredding jobs, and permanent mode is designed for large shredding jobs. The security level 3 setting shreds up to 22 sheets at a time into 3/16" x 1-1/8" pieces. The security level 4 setting shreds up to 15 sheets at a time into 1/16" x 9/16" pieces. Cutting speed is 17' per minute. Cutting rollers are made of specially hardened steel. Shredder has a 12-1/5" throat opening, shred-bin level indicator, level indicator, removable waste container, folding safety element and continuous motor operation. Waste bin holds up to 20.4 gallons. Shredder rolls on four casters.