Role-play as Go-on Green or Go-on Black with this Henshin Brace Shift-Changer! Strap the transformation device on to your left wrist, insert the provided Change Soul, and push the shift lever upwards to complete the transformation. When the Change Soul is inserted, an initiation sound will play. Press the A key to play the klaxon sounds of Engine Birca, Engine Gunpherd, and Engine Carrigator. Press the B key to play warning sounds. Other Engine Souls from Bandai's Go-onger toy line can also be inserted into the Shift-Changer to play various sound effects and Engines' phrases! Three test button batteries are included.