LEGO Power Functions Parts No noticeable stains or dirt. I have confirmed the power lamp by inserting 6 batteries. I have also confirmed the operation of the remote control and motor rotation by matching the channels. However, the blue lever on the remote control sometimes responds and sometimes doesn't, so the contact is poor. The red lever lit up every time. Two motors. Thank you for your understanding. Batteries are not included. LEGO NXT Robot Parts, can store AA batteries and connect multiple sensors. - Type: LEGO Robot Parts - Model: NXT - Battery Storage: Can store 6 AA batteries - Connection Terminals: Can connect multiple sensors and motors - Color: Gray LEGO Genuine Product Authentic LEGO LEGO TECHNIC Technic Controller Receiver Receiver Battery Cover Case Motor Power Electric Parts