This is a race-oriented electric radio-controlled buggy assembly kit that inherits the genes of the high-end 4WD racing buggy, the TRF501X. It uses a highly efficient 2-belt 4WD system, and the suspension is a 4-wheel double wishbone with basically the same geometry as the TRF501X. It has a wide range of setting performance, such as using turnbuckles on the upper arms and arranging multiple damper pivots. In addition, a ball differential is equipped as standard inside the compact front and rear gear cases. The tires are equipped with High Density Spike K, which provides good grip on a wide range of road surfaces. RC mechanism (Expec GT-I, or 2-channel radio with FET amplifier), battery and charger (Tamiya 7.2V Racing Pack, or various 7.2V Advanced Packs) are sold separately.