Feature:1. medical-grade replacement pads are comfortable, reusable, and evenly distribute electrical currents.2. electrode pads for gentle massage.3. convenience and durability,with a white non-woven backing ,non-irritating to your skin.4. provide superior conductivity and effective relief for muscle soreness, tired muscles, and back pain.5. Compact and lightweight design. 100% brand new and high qualityMassager Pads Size:9.6X4.2cm/3.8X1.7in 6.9X3.7cm/2.7X1.5inQuantity: :2 pairsone pair big ,one pair smallPowered by: 2 x AAA battery (not included)Notice :only for Pads not include MachinePackage include:4 * Massager Padsone pair big ,one pair smallNote:1.Due to the different monitor and light effect, the actual color of the item might be slightly different from the color which is showed on the pictures.2.Please forgive 1 cm/0.39"-3 cm/1.18" measuring deviation due to manual measurement.