Notice S40 PRO currently out of stock for shipping is A40 PRO and the color is blue Except for the color area other parameters and functions of the two models are consistent One Key Switch Engraving 24W Cutting Mode 48W Cable Drag Chain Standard Automatic Switch Air Assist Kit with Double Pump Z axis Rotary FocusMain Features 1 High Power ATOMSTACK X40 Pro the cutting edge laser engraver has the highest 48W optical power in the industry for professional work and greatly improves work efficiency He can cut through 18mm basswood pine and tung wood 9mm mdf density board and 0 1mm stainless steel sheet at one time 2 One Key Switch Engraving Cutting Mode ATOMSTACK X40 Pro adopts a new laser design it can switch between 24W and 48W output power with one key by physical button For different work of engraving and cutting open different modes ATOMSTACK X40 Pro can be both fine engraving and powerful output 3 New Motion Structure Unlike Atomstack s previous machines ATOMSTACK X40 Pro adopts a linear guide X axis with better structural stability which makes X40 Pro work stably at a high speed of 600mm s and engraving and cutting lines smoothly without jittering 4 Cable Drag Chain In order to make the machine more beautiful and the structure more stable ATOMSTACK X40 Pro adopts the drag chain wire harness solution that other models do not have so the wire harness runs smoothly without tangling and improves the wire life 5 Professional Cutting Machine ATOMST