5 Inch colour touch screen,self-developed soft-ware,simple interface,easy to operate,software can becustomized to upgrade the researchand development. L4pro handheld marking machine has a wide range of applications, which can be used for personalized customization marking such as QR code,bar code,text,serial number,date,Character,Image,logo and so on. Removable battery Up to 6 hours or more of continuoususe on a full charge, with a massive 9000mAh battery that goes whereveryou go. Dual Preview Modes,pro-jected border & graphic,to quicklyand accurately determine the engraving position.Quick preview lets you see the result before engraving, and adjust the position of your design on the fly. You can preview the overall pattern position or pattern outline. Portable and lightweight, Unlike bulky, traditional industrial marking machines,the weight of L4pro,the whole machine 1.1kg. 1. Permanent mark, can't be wiped off