Features: 1. The Top One Is TX, The Bottom Antenna Is RX, UHF+VHF 2. Please Select Modem: STM32_HS_GPIO 3. Set TX Frequency, RX Frequency 4. It Is Best To Keep The Tx And Rx Frequencies At Least 10m Apart. 5. SLOT1, SLOT2 Support<br><br>Description: 1. Type: Extended Version 2. Function: With Screen, With USB Version Note: Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use Material: PCB+Plastic colour: As Shown<br><br>Package Contents: 1 x With Screen/With Usb Version Expansion Board Module 2 x Pin Headers (Random Colors, Cannot be chosen the specific color.) 2 x Antennas<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.