Features: ES900TX ES900RX RF Module Set: This product is a set of 915MHz ELRS RF module receiver sets, providing reliable signal transmission and control for remote-controlled aircraft and FPV remote drones. Remote Drones DIY Parts: Suitable for DIY enthusiasts, this set can be used as key accessory for assembling remote-controlled aircraft or FPV drones. High Performances RF Module: Adopting 915MHz ELRS RF technology, it has stable signal transmission and long-distance remote control capabilities, providing a reliable remote control experience in complex environments. Package Design: includes two parts: ES900TX transmitter and ES900RX receiver, which are compatible for users to install and connect. It also supports multiple hardware and software configurations. Strong Scalability: Supports compatibility with other devices and sensors, such as global positioning system navigation system, telemetries modules, etc., to meet the needs of different users for drones functionality. Specifications: Material: PCB+Plastic Type: ES900RX 915, ES900TX 915 and ES900RX 915, ES900TX 915 (optional) ES900RX receiver: Power input: 5V Working current:~100Ma Work Agreement: CSRF Receiving frequency ranges: 915MHz Size: 12mmx12mmx3mm Weight: 0.6g (excluding antenna) Antenna terminal: IPEX1 Telemetries output power:<17dBm ES900TX high-frequency head module: Size: 55mmx39mmx11mm (only for high-frequency module) Weight: 9.2grams (only for high-frequency module) Antenna terminal: SMA Input power supply: 5-13V, recommended 5V-9V Working frequency ranges: 915MHz Output power:up to <33dBm Package Includes: 1x ES900TX 915 high-frequency head module kit with ES900RX 915 receiver module kit or 1x ES900TX 915 high-frequency head module kit or 1x ES900RX 915 receiver module kit note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.