The Yamaha MS45DR E-Drum Monitor is a 2.1 system for E-Drums with a power of 20w. The monitor system consists of a subwoofer and two satellites, each with 20 watts of power. The two satellite speakers are equipped with clamps for 1.5" racks. The high-quality Yamaha subwoofer reproduces the low frequencies of the Bass Drum and Floor Tom. The two satellites can easily be attached to any conventional E-Drum rack and produce balanced mid-range and treble. All cables are included.