Power supply: 6 x button batteries for cockroach and remote control (included) and open the ON/OFF switch on its body and put your hands on the Remote Control transmitter. Size: Cockroach base - approx. 15cmx8cmx3cm/5.90''x3.14''x1.18";Remote Control - approx. 6cmx3.5cm/2.36"x1.37". On-frequency operation:you can choose the A or B or C channel, and press the forward button to start on-frequency operation. If the on-frequency is fail ,you need to switch other channels, and then continue to button on the frequency until success, so that the Cockroach will move up.