Computerized Operation: The machine features an integrated control panel that is designed to be easy to use, with a voice guide/reminder function for each operation and button. \nAutomatic Functions: It often includes an automatic presser foot lifter, automatic thread trimming (for some variants like the RA4-Q), and auto-tagging functions, which increase productivity and ease of use. \nDirect Drive Servo Motor: The integrated direct drive motor offers high power and significant energy savings (up to 50-70% compared to traditional motors) while operating quietly. It allows for a maximum sewing speed of up to 5000 stitches per minute (s.p.m.). \nVersatility: The machine is designed to handle a wide range of fabrics, from light materials to heavy-duty fabrics like denim and yarn. The presser foot lifting height is typically adjustable up to 13 mm. \nIntegrated Design: It features a clean, "German Design" with an integrated motor and control box, which often means clean sewing without oil stains on the fabric. \nConnectivity: It includes a USB port for convenience, which can be used for charging devices (like a cell phone or cooling fan) or upgrading the software.