[. . . ] Transmitters other than the one included cannot be used with this product. When the LED indicator flashes, replace batteries as soon as possible. [. . . ] When switching power off, always disconnect the battery on the boat first. To use the AIR STREAK 500 safely, always follow the safety precautions below. The AIR STREAK 500 requires assembly before use, maintenance after use, and can also be enhanced by replacing some parts with optional upgrade parts. Improper usage with Alkaline cells or rechargeable batteries may damage the electronics for the model or the radio. *This shows you possibility of significant damage to life and/or body if the following explanations are not adhered. First-time builders should seek advice from people having building experience in order to assemble the model correctly. As the product includes small and sharp parts, assemble and store this product only in places out of the reach of children. Do not operate the model on public waterways, in crowded places or near infants. *This shows you possibility of minor injury and/or damage of material property if the following explanations are not adhered. When not using the model, disconnect and remove batteries from the model and the transmitter as batteries may overheat or leak causing damage. Please do not operate on the same band (frequency) as other models close by as loss of control will result. As the front end of the antenna may be dangerous, do not aim it toward faces. [. . . ] * *After 10 times running, remove Shaft then apply Grease (purchase separately). Senderantenne ist nicht voll ausgezogen L'antenne n'est pas suffisament déployée Antena de la emisora no extendida en su totalidad Somebody is using same frequency as you do the same time. [. . . ]