Features: Plate: flat without deformation, no burr on the cutting surface, and the board edge is neat. Solder joints: no solder joints, no sticks, vertical cones, full, smooth, shiny. Board surface: no debris, no tin slag, clear writing, clean and tidy surface. The process: the use of the latest technology, the entire network of unique fine-grained chip electronic board. Drive: no need to install the driver, plug and play. Color: environmental protection and healthy green. Material: ultra-high precision, environmental protection, high temperature resistance, deformation resistance, fire prevention. Environmental protection fire board surface is clean and tidy, high technology, real material, fine craftsmanship. Specifications: Condition: 100% Brand New Material: High Precision PCB Process: High Precision SMT Size: approx. 5.5*3.1*1cm / 2.2*1.2*0.4in Package list: 1 * Chip circuit board 1 * USB cable 4 * Micro lines 10 * Button lines Note: 1.Please allow 0-1 inch error due to manual measurement. Thanks for your understanding. 2.Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. 1、Plate: flat without deformation, no burr on the cutting surface, and the board edge is neat 2、Solder joints: no solder joints, no sticks, vertical cones, full, smooth, shiny 3、Board surface: no debris, no tin slag, clear writing, clean and tidy surface 4、The process: the use of the latest technology, the entire network of unique fine-grained chip electronic board 5、Drive: no need to install the driver, plug and play