WIFI firmware upgrade,ELRS open source project, remote control Maximum refresh rate of 1000Hz,Two RF receiving links, true diversity receiver Using temperature compensated crystal oscillator (TXCO), no fear of high or low temperature, more stable performance, even if working for a long time is not easy to cause out of control Built-in PA+LNA, up to 100mW return power Chip:ESP32-PICO-D4, SX1281 Crystal oscillator: Temperature compensated crystal oscillator Working frequency: 2.4GHz ISM Refresh rate: 25Hz-1000Hz Working voltage: 5V Antenna interface: ipex1 Indicator light: Color RGB light power: 20dBm Binding The factory firmware version of the ELRS DUAL 2.4G diversity receiver is 3.x or above. 3.x and 2.x firmware are not compatible, so the high frequency needs to be changed before frequency matching. The firmware is upgraded to 3.x or above; 1. The receiver is powered on and off three times in succession (within 1 second); 2. Observe the receiver's RGB light, which changes from a rainbow gradient to an orange double flash state after startup, indicating that the receiver has entered the frequency binding state; 3. Use the ELRS remote control or tuner to bind the receiver. When the RGB light on the receiver changes from double flashing to steady on, the binding is successful. Due to different batches, there may be differences in product appearance, color, and printed text, which will not affect the use. Colour:Black Material:PCB Package Contents: 1x module (with two antennas) 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.