Features:  1. Slow wire feeding to start the arc and can ensure the arc is starting successfully.2. The molten droplet is controlled to transfer stably while the welding process is highly stable. Good welding bead forming & Less Spatter created.3. Adjustable arc pushing force: better control and stabilize the arc.4. Arc finishing feature: can adjust voltage and current while finishing arc welding to adapt to different application needs.5. Stepless welding capacity adjustment provides smooth operation, suitable for engineering and metal-sheeting industries. Model: FR-250A & FR-350AFR-250A output current: 40~250AFR-350A output current: 50~350AOther specification regarding the two models, please send email to get detailed catalogue. Thanks.