The OptoSmart Laser Training Module is the laser module without the putter for players who want to practice with their own putters. The module can be mounted to most heel shaft right-hand putters with special adhesive provided in the package. It will not work on center shaft putters because the laser module has to be mounted on the center of the putter. Package Contents: One laser module with adaptor plate, three LR44 button batteries included in the module, an extra set of three LR44 button batteries, removable and reusable clear mounting tabs. The photograph of a package is shown on the home page. Mounting Method: The left-upper figure illustrates the simple method to mount the laser module to a putter. Make sure to align the center alignment mark of the laser module to the sweet spot or the center line of your putter. The laser module is mounted to the putter head using the adhesive mounting tabs provided in the package. The tabs provided in the package is specially selected for this application. It will not dry out, is completely reusable, and leaves no residue or stains on your putter. It is strong enough for normal putting purpose and is not intended for high swing speed. Extra tab or tape is available at hardware stores, department stores, and supermarkets. The complete mounting steps are given in the Safety and Operating Manual in the package.