POWER UP RACING ACTION: Convert Autobots Unite Speed Series Optimus Prime toy to vehicle mode and attach the Energon Core to activate driving action! (Energon Core sold separately, subject to avail ... ability) 3-INCH SCALE: This 3-inch scale Transformers Optimus Prime robot toy features easy, classic conversion 2 MODES: This Transformers Optimus Prime action figure converts from robot to truck mode in 6 steps TRANSFORMERS: RISE OF THE BEASTS: Featuring some characters inspired by the epic Transformers movie, Transformers: Rise of the Beasts! COLLECT ENERGON CORES: Power up Speed Series figures with Energon Cores included with Autobots Unite Nitro Series and Power Plus Series Transformers toys (each sold separately, subject to availability)