1. Main interface long OK key to lock/unlock the manual channel, short to enter the menu; unlocked case, -up, down, left and right to adjust the frequency. 2. The menu interface is divided into three pieces of content:Scan, Settings, About. up and down to switch menu options, OK to enter -menu, left button to return to the main interface. 3. Scan menu has three subcontents. Graph Scan displays the signal strength of frequency 5300-5900 MHz. Table scan display chart channel signal strength by different colors, of the scan, frequency switch to the most current channel with the best signal strength, and displayed in the upper right corner. Calibration is used to calibrate the rssi. Failure to turn on the map transmission cause the calibration to fail, and success save the result. 4. Settings interface can set the display backlight intensity, power-on animation, whether the buzzer is on. 5. Firmware can be upgraded through TYPE-C USB interface. Adaptation: for Fatshark Dominator V1, V2, V3, HD1, , HD3, HDO, HDO2 FPV Glasses for 04L,04X FPV Goggles for V1 V2 FPV Goggles Hardware:ESP32 microcontroller + 0.96 inch TFTLCD + 5-way Pushbutton + homologation-98dbm receiver module + buzzer Interface:LVGL based bilingual interface Frequency:5.8G 48 frequencies (A,B,E,F,R,L) Power supply:5V@450mA Upgrade points: 1. Smaller size, easier to install 2. Support USB direct firmware upgrade NOTE:Cables in pictures are not included. Due to different batches, there may be differences in product appearance, color, and printed text, which not affect the use. Colour:Black Material:PCB Package Contents: 1 * Receiver Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.