Each of these two drums bears a line of runes engraved around its base.

This pair of drums includes a harness that allows them to be strapped to a humanoid creature. A character who plays drums of marching during overland movement and succeeds on a DC 15 Perform (percussion instruments) check grants allies within 120 feet a +4 bonus on the Constitution check to avoid nonlethal damage from a forced march (PH 164). Using the drums doesn’t adversely affect a performer’s speed.

Prerequisites: Craft Wondrous Item, longstrider.
Cost to Create: 500 gp (plus 100 gp for base item), 40 XP, 1 day.