Package Included: - 1 x Set of Metal Tank Car Body - 1 x Set of 6DOF Mechanical Arm - 1 x 51/Arduino/STM32 Controller Board (Optional) - 1 x USB Data Cable - 5 x TBS2701 Data Servos - 1 x TBSN-K15 Flame-resistant Servo for Gripper - 2 x DC Speed-down Motors - 1 x Charger - 1 x PS2 Controller - 1 x B-T 4.0 Module - 1 x Android Mobile Phone APP - 1 x Overall DIY Material - 1 x Ultrasonic Sensor - 1 x Color Recognition Sensor - 2 x Tracking Sensors - 1 x Voice Sensor