This is a hobby item from my father's past. A remote control accessory set including a JR PROPO checker and gyro. JR PROPO Checker Gyro: JR GYRO MEJ-120 BB Other accessories: Multiple remote control accessories 4N600 x 2 (One is clean, so it may be new) 4N350 x 1 Please check the photos carefully. Operation is not guaranteed. It may be completely junk since it's old. I don't know what these are used for, so I can't answer questions about the product. Please purchase only if you understand.