... model:Technical Specifications1) Print Height: 14mm. 21mm, 36mm, 40mm, 50mm2) DOT Matrix: 5*7 or 7 * 7 or 16 * 103) Speed: 40M ... oil, invisible ink, environment-friendly ink11) Modular Design: Power source module, circuit module, ink cycle module12) Power: 95-260V, 50-60Hz Drop ...