These enchanted boots, crafted in the eladrin tradition, increase your teleport distance.
Feet Slot 45,000 gp
Add 2 to the maximum range of any teleport you make (other than that provided by these boots).
Power (Teleportation) Daily (Move Action)
Teleport up to 5 squares (or up to 10 if you're an eladrin).
Published in Player's Handbook, page(s) 246.