2.4GHz 7CH RC Radio System Transmitter & Receiver Board with Led Light Winch for WLtoys/HBX/JJRC RC Car Boat Tank Specifications: Product Name: Transmitter & Receiver Board Product Material: Electronic Components Channels: 7CH Frequency Range: 2.4GHz Product Weight: 187g for Transmitter Alone; 9.1g for Receiver Alone Packaging Size: 23CM Long, 13CM Wide, 15CM High Packaging Weight: 341.5g Applicable Models: WLtoys 144010, 124017, 124016, 124007, 124008, 184016;HBX 3100A;JJRC C8803 and Other Independent Receiver Remote Control Car Models. Note: 1. This product is a modified upgrade accessory, not an original accessory 2. The packaging changes frequently, and the size is for reference only. 3. This product is recommended to use the forward, backward, steering, and light control functions. Other difficult modifications such as servo gear shifting and winch require players with very strong hands-on ability to do it. It is not recommended for ordinary players to try, otherwise it may be time-consuming and unsuccessful. Package included: 1x Receiver Board 1x Transmitter 1x Instruction Manual