The adapter helps me to avoid changing batteries and it works very well. I am very happy with this product.
This item was suggested to go with the NordiTrack GX 2.5 bike but a power supply comes with it. Never opened the product and was going return for a refund based on not needing but now it is going back with the bike that doesn't work. Don't buy a Nordic Track bike the tension does not work and the instructions in the manual do not help.