The Jacobs Ladder GTL Stairway Stepmill is a high-quality stepper designed for gym and training purposes. With its unique circuit board 90-JL and casement, this stepper provides a challenging and effective workout experience. The brand Jacobs Ladder is known for producing reliable and durable fitness equipment, making this model a great choice for anyone looking to enhance their cardio fitness. -USED Circuitry Boards ONLY as shown in photos AS is No Warranty Or Guarantee