7-channel full-ratio ELRS 2.4G receiver Can switch CRSF bus mode without reflashing firmware PWM 6CH/7CH CRSF switching without reflashing firmware Equipped with T-type antenna and copper tube antenna, no need to purchase separately Small size, saves space and weight<br><br>Name: ELRS2.4GPWM/channel receiver Firmware model: DIY_2400_RX_PWMPEX Antenna: IPEX MHF+T antenna/copper tube antenna Microcontroller chip: ESP8285 RF chip: SX1280/SX1281 Return power: 12.5dbm/17mW Firmware version: ExpressLRSV3.2 Circuit board size: 18.5mmx26mm Number of channels: 7CH Working voltage: 4-6V Protocol: PWM/CRSF switchable 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 Colour:Black Material:plastic<br><br>Package Contents: 1 x Receiver 1 x T-type Antenna 1 x Copper Tube Antenna<br><br>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.