Echo tome

Cost: 15 gp
Weight: 3 lb.

The cover of an echo tome is a plate of iron inlaid with silver, and its pages are thin sheets of mithral engraved with arcane secrets.

Distant (The range of your area and ranged attack powers increases by 2 when they’re used through a distant implement.).
Unerring (You gain a +1 bonus to attack rolls against Reflex when attacking with an unerring implement.).

Tome (Most tomes contain one or more wizard spells, often supplemented by information on improving the spells’ effectiveness. You can’t make melee attacks with a tome.
If you are a member of a class that can wield a tome as an implement, you can add the tome’s enhancement bonus to the attack rolls and the damage rolls of implement powers from that class that you use through the tome, and you can use its properties and powers. Members of other classes gain no benefit from wielding a tome.

Published in Player's Handbook 3, page(s) 195, Mordenkainen's Magnificent Emporium, page(s) 40.