Feature: 1. Non Interference: Strong anti interference, longer distance, more convenient. 2. Replacement Parts: The AR8000 2.4ghz 8 channel is a premium replacement part. 3. Versatile: The AR8000 is packed with industry leading features, including extremely fast input to output response with an 11 ms frame rate when used with a powerful transmitter, and 2048 resolution for ultra glossy servo travel. 4. Suitability: Ideal compact size for any application from extreme 3d to competition helicopter performance. 5. Easy To Use: An automatic button frequency, suitable for connecting to a mini fly controller, and a transmitter can be connected without a receiver. Specification: Product Material: Plastic, Electronic Components Channels: 8 Frequency Band: 2.4Ghz Voltage Range: 3.5V-9.6V Applicable To: for AR6210 AR12120 AR9020 Universal Note: 1. Please allow 13mm error due to manual measurement. Thanks! 2. The monitor calibration is inconsistent, the color of the item shown in the photo may be slightly different from the actual object.