Internal Antenna for RC models. Please note this is suitable for 1.10 or 1.8 models. 3mm screws included and used. This antenna replaces the plastic tube wire antenna found on most 27mhz am models. Note this is not suitable for planes and will only with rc model car receivers. The instructions included are in Chinese. However pictures show how to use this item. It will require cutting the receiver wire to connect to the antenna. A small bit of card will need to be used but not included to wrap the receiver wire round to shorten it. You should never cut the receiver wire to reduce length. Please note that this item requires modification to a reciever. The purchaser acknowledges and understands that they alone assume all risk and liability for personal injury or damage to property resulting from the buyers use of this product.