Description <br> 7-channel full-ratio ELRS 2.4G receiver <br> Can switch CRSF bus mode without reflashing firmware <br> PWM 6CH/7CH CRSF switching without reflashing firmware <br> Equipped with T-type antenna and copper tube antenna, no need to purchase separately <br> Small size, saves space and weight <br> <br> Name: ELRS2.4GPWM/channel receiver <br> Firmware model: DIY_2400_RX_PWMPEX <br> Antenna: IPEX MHF+T antenna/copper tube antenna <br> Microcontroller chip: ESP8285 <br> RF chip: SX1280/SX1281 <br> Return power: 12.5dbm/17mW <br> Firmware version: ExpressLRSV3.2 <br> Circuit board size: 18.5mmx26mm <br> Number of channels: 7CH <br> Working voltage: 4-6V <br> Protocol: PWM/CRSF switchable <br> Note: Factory firmware 3.2.0, if your high-frequency head firmware is lower than version 3.0, it is recommended to update to 3.2.0 to use 7 pwm full-ratio channels, 2.x only has 4 full-ratio channels <br> Colour:Black <br> Material:plastic <br> <br> Package Contents: <br> 1 x Receiver <br> 1 x T-type Antenna <br> 1 x Copper Tube Antenna <br> <br> Only the above package content, other products are not included. <br> 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. <br>