This harp emits soothing tones on its own, and it can continue to play itself even after you have stopped.
Wondrous Item 4,200 gp
Bards can use this item as an implement for bard powers and bard paragon path powers. As an implement, it grants a +2 enhancement bonus to attack rolls and damage rolls, and it deals 2d6 extra damage on a critical hit.
Power (Charm) Daily (Standard Action)
Until the end of your next turn, enemies take a -2 penalty to Will while within 5 squares of the harp.
Sustain Minor: The effect persists until the end of your next turn. You can sustain this effect even if you no longer hold the harp and as long as the harp is within your line of sight.
Published in Dragon Magazine 390.