Nano V2 Tower Antenna Features: T-FHxx compatible with Futaxx transmitters. High performance CPU for improved precision control The tower antenna combines good signal reception and space saving. Super light and super small size supports 4 channels perfectly. Perfect for Micro Racing Cars Specifications: Operating Voltage: 3.5 V - 12 V DC Size: 19mm * 12mm * 7mm Weight: 1.4g Compatibility: 10PX 7PXR 7PX 4PM 4PXR 4PX 4PLS 4PL 7XC 4GRS Pairing Method: See 5th photo 1:Put the transmitter and receiver within 50cm 2:Turn on the transmitter/receiver 3: Press the BIND button on the receiver for about 2 seconds. The LED starts flashing red. If the transmitter and receiver are linked after the LED is switched to red flashing (green red), turn off the transmitter and receiver and turn it on, then the receiver LED will turn green and it is OK. The binding is complete. Normal/Fast Mode: "Normal mode" accepts all servos or peripherals. "High Speed mode" only accepts digital servos including the BLS series and most peripherals such as brushless ESCs. For a comfortable driving experience, please pay special attention to the information contained in the transmitter manual Package Includes: 1 x Futaba 4CH (Nano V2 Tower Antenna) 4 x 1.5mm 3P JST Cable