Checkout https://rc-modul.playmobil.com/ for compatible vehicles. to upgrade all RC compatible PLAYMOBIL vehicles. Transmitter requires 1x 9V block battery; Battery box requires 4x 1.5V Mignon batteries (no batteries included). - After each battery change (batteries not included), a new pairing between transmitter and receiver must be carried out using the buttons on the bottom. - If the receiver module is ready to receive, the red LED lights up constantly. Figures: none; Animals: none; Accessories: 1 transmitter module, 1 receiver module, 1 hand-held transmitter, 1 steering unit, 1 cover