Type: 915MHz/868MHz true diversity receiver ESP32 D4, dual SX1276 Dual antenna connector: MHF1/U.FL frequency: 915MHz or 868MHZ Telemetry power: 17dbm Receiving protocol: CRSF/SBUS, etc. Input voltage: +5V DC @+ pad PCB size: 22mm x14mm Built-in TCXO (temperature compensated crystal oscillator) Firmware target: Generic ESP32 True Diversity PA 900MHz RX (ground station required To update to 1.6.0) Due to different batches, there may be differences in product appearance, color, and printed text, which not affect the use. Colour: Blue Material: PCB Type: C: 915Mhz Dual-83mm antenna feeder x2 Package Contents: 4x Receiver 8x Antenna 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.