Zebra ZT231 4" 300DPI Direct Thermal Industrial Label Printer - USB LAN / SerialThese units are in very good cosmetic condition with perfect print output. This version is Direct Thermal only. Key selling points Print methods: direct thermal or thermal transfer Construction: metal frame and metal enclosures Bi fold media door with large clear window Side loading supplies path for simplified media and ribbon loading Thin film printhead with E3 Element Energy Equalizer for superior print quality Three color LEDs for quick printer