Epson DLQ-3500, 550 cps, 360 x 180 DPI, 495 cps, Code 39, POSTNET, UPC-A, UPC-E, A3 (297 x 420 mm), 128 KB Epson DLQ-3500. Maximum print speed: 550 cps, Maximum resolution: 360 x 180 DPI, Normal print speed: 495 cps. Maximum print size: A3 (297 x 420 mm). Buffer size: 128 KB, Sound pressure level (printing): 59 dB. Standard interfaces: Parallel, USB 1.1, Optional connectivity: Ethernet. Print head: 24-pin, Print head life: 400 million characters, Mean time between failures (MTBF): 10000 h