Customized stimulation for your lower back Back pain can be debilitating, striking a hardtoreach area that's difficult to treat. The Butterfly Back Pad's design allows you to easily apply muscle stimulation to your lower back, and accelerates recovery by mirroring treatment on both sides. • Each pack includes 1 large reusable butterfly electrode pad • Compatible with PowerDot 2.0 only To use the Butterfly Back Pad with your PowerDot 2.0, connect one pod and lead cable to the Butterfly Back Pad and apply to the area you are looking to treat. Rectangular Pad Dimensions: 3.5 in x 2 in (9 cm x 5 cm) Round Pad Dimensions: 2.1 in diameter (5.5 cm diameter) Weight: 0.05 lbs. (0.02 kg) Material: Hydrogel adhesive Compatibility: PowerDot 2.0