CONTROLLER (X1) BATTERY INSTALLATION HAVE AN ADULT REMOVE BATTERY COVERS WITH SCREWDRIVER (NOT INCLUDED) 4 ARA (R03) BATTERIES REPLACE BATTERY. COVER WHEN FINISHED. ALTHOUGH THE POWER BODSTERâ„¢ RECEIVER 15 DESIGNED ID FIT VEHICLE INSTALLATION NUMEROUS 1:64 BOLE DIE CAST VEHICLES, SOME VEHICLES MAY BE TOO LARGE TO FIL IF VEHICLE DOES NOT FIT DO NOT FORFEIT FIT.