Specifications Technology: On Demand Piezo Electric Max. Resolution: 1200 dpi Droplet Size: 6 to 90 pico litre Maximum Grayscale Levels: 16 Tot. Amount of Nozzles: 318 Nozzle Spacing: 169 microns Firing Frequency: 28 kHz (1 drop) - 2.8 kHz (15 drops) Driving Voltage: 14 - 31 V Ink Compatibility: Oil Based Pigment Ink and UV Ink Voltage and waveform in the QR code.