The ORIGINAL after-market laser designed and tested BY sewists FOR sewists. Fits on most sewing machines. Comes with a long lasting rechargeable battery so there is no need to find another outlet in your sewing area. No mounting brackets needed. ** This model has a Rare Earth Magnet inside. It is designed for metal head machines, not machines with plastic heads**. Keep your seams just where you want them to be without having to mark the fabric. Use the included Laser Alignment Guide to set the laser for the exact seam allowance you want. Half square triangles are fast and easy. Includes 3 heads – line, dot, and crosshair. The line creates a perfect straight line, the dot is ideal for applique, curved piecing, and following a stencil, and the cross hair is perfect to make sure your squares are true as well as to find the center of an embroidery hoop. No mounting brackets needed. Affixes easily to any available metal surface. Easily moves from machine to machine. All ViviLux products have a Manufacturers 100% Customer Satisfaction Guarantee INCLUDED: • ViviLux 3-in-1 Red Laser with Rechargeable Battery • Rare Earth Magnet (inside) • 3 adjustable laser heads • Laser Alignment Guide • USB charging cord