Brother HL-5450DN is a monochrome (black and white) workgroup laser printer. This model is a super high speed printer which has a 40 page per minute print with first page out in 8.5 seconds. The Brother HL-5450DN has a 300 sheet total input capacity and 150 sheet output capacity, it includes 1 x 250 sheet capacity and 1 x 50 sheet capacity. It's monthly duty cycle is 50,000 pages. The print resolution is a high quality 1200 x 1200 dpi, which makes each print look professional and sharper. The media types are envelopes, transparencies, labels, plain paper, bond paper and recycled paper. The media sizes are letter A size, legal, executive, A4, A5, B5 and B6. The Brother HL-5450DN uses two toner cartridges and one drum unit, the toner cartridges consist of a standard yield and a high yield toner. The standard yield can print up to 3,000 pages at 5% coverage, while the high yield can print up to 8,000 pages at 5% coverage. The toner cartridge model numbers are TN720 (TN-720) which is the standard yield and TN750 (TN-750) which is the high yield toner. The drum unit model number is DR720 (DR-720), which has a duty cycle of 30,000 pages at 5% coverage. This model also features automatic duplexing, 64 MB of memory, 400 MHz processor, USB 2.0 and ethernet connectivity.