Complex sentence: The Rangers'transformation devices, which are detachable silver buckles kept on each Ranger's waistband containing magical gold medals engraved with the Rangers' respective Guardian Beast and are activated by shouting "Dino Buckler!".
Split into simpler sentences: The Rangers'transformation devices, which are silver buckles that contain gold medals engraved with the Rangers' respective Guardian Beast. The Bucklers are activated by shouting "Dino Buckler!".