Advanced Communication Technology: Equipped with MAVLINK protocol for enhanced data transmission, ensuring reliable and efficient communication over long distances. High Precision TCXO: The Temperature Compensated Crystal Oscillator ensures stable frequency operation, critical for maintaining connection in varying climatic conditions. Optimized for RC Models: Specifically designed to boost the performance and range of remote control models, making it ideal for hobbyists and professionals alike. RF Frequency: 900MHz (868MHz, 915MHz FCC) 915MHz RF power: 21dBm (min) / 22dBm / 24dBm / 27dBm / 30dBm (1000mW) 868MHz RF power: 24dBm (min) / 24dBm / 24dBm / 27dBm / 30dBm (1000mW) Antenna connector: IPEX MHF-1 TX1/RX1: Bi-directional Serial MAVLink TX2: RC out(CRSF or SBUS) one buttom for DFU mode and Bind Power supply: 4.5-13V DC @ "V" Pad Power dissipation: 340mA@5V IN(31Hz, 30dbm) The product appearance and printed words depending on the batch, but this does not affect use. Colour:Blue Material:PCB Package Contents: 1 * MR900-30 1 * IPEX MHF1 dipole antenna 1 * Heatsink 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.