Improved circuit design ly upgraded Temperature Compensated Crystal Oscillator (lower packet loss, high frequency stability) High-performance at 900MHz (915 / 868 bands available) Performance and Compability Make sure to install the antenna away from conductive or magnetic components (carbon, metal, motors). Antenna connector: Firmware: ExpressLRS 900MHz Nano RX(868MHz/918MHz) Frequency bands: 868MHz EU/915MHz FCC Telemetry Power: 17dbm (50mW 868/915MHz) Dimension: 10x13mm Connector: SUR0.8 Connector Interface: RX TX 5V GND Input voltage: 5V Protocol: CRSF Weight: 0.5g NOTE: Due to local regulations, the 915MHz FCC region seems to have a better performance than the 868MHz EU region. Checkout the official ExpressLRS website: https://.expresslrs. Official ExpressLRS Quick Start: https://.expresslrs./2.0/quick-start/-started/ Colour:black+blue(868/915MHz) Material:plastic+metal Package Contents: 1 x ELRS Nano Receiver 1 x 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.