... Drop On Demand PiezoActive Nozzles 510.35PLNative Resolution 180 dpiActive Print Swath 2.8 inches (71.8mm)Drop Volume 35 plFiring ... Frequency 6-8 KHzLinear Print Speed 0.49 m/sec, 360dpi, 7KHzInterface 30 Pin Proprietary ... , Yaselan, Mutoh, Roland, Mimaki, Flora, Phaeton, Crystal, Aprint, etc. Original Seiko SPT510 35pl/ SPT510 50pl Printhead