Multi-size compatibility: Provides adjustable paper guides to print paper labels of various sizes, meeting your diverse printing needs. Adjust the width range is 20-80mm. Multi-system compatibility: Drivers can run smoothly on Windows XP, 7, 8, 10, Mac Os systems. If you need to use a mobile phone for printing, please select the Bluetooth version and download the mobile printing app to print labels through your smartphone Durable and cost saving: Adopting direct thermal printing technology, no carbon ribbon or toner is required. One machine for two purposes, can print labels and receipts Dual mode printing: supports printing self-adhesive labels, as well as bills, with one machine for two purposes, suitable for more usage scenarios Equipped with a scale: the size of the label can be easily measured at a glance, anytime, anywhere, without the need for tools to measure the width of the label Adjustable cardboard holder: No need to disassemble, slide left and right according to the size of the label Specifications: Model: K30F Print mode: Thermal Resolution: 203DPI（8dots/mm） Max print speed: 90mm/s Max print width: 72mm Max print length: 300mm Paper width (including release paper): MAX 80mm Outer diamter of paper roll: MAX 50mm Paper positioning mode: Gap, continuous, Black Label Communication mode: USB, Bluetooth Charging Port: Type-C Power source: Output: DC 5V?2A Battery Capacity: 2200mAh Body size: 118*110*58mm Body weight: 385g Safety certificates:CCC, CE, FCC, RoHS