🎁 Free Air Assist ($59.99) and KR PRO ($259.00) Upgraded Rotary Roller ✅ Powerful and Precise: With 34-36w power and advanced laser coupling technology ✅ Detailed and Intricate: Compressed spot size of only 0.06*0.1mm -1/3 of the spot area of others ✅ Powerful Cutting: Cut 18-22mm paulownia board, 12mm black acrylic board ✅ Air-assist improves engraving quality and cleanliness.