All Models X3 LoRa interface is RP-SMA hotspot end.
（NOTE:EU868 Hotspot shipped before September 2021 may integrate SMA hotspot end. ）
X3 hotspot
NOTE1:
When you purchase antenna, cable and filter, you need to check and pay attention to SMA connector. RP-SMA-K to RP-SMA-J and SMA-K to SMA-J is ok, any other combination is wrong.
NOTE2:
Install the LoRa antenna on the LoRa Antenna port.Do not connect to other interfaces (such as RF)
NOTE3:
You can purchase antenna, feeder, filter and other accessories through Cotx shop.
COTX SAW Band Pass Filter — COTX Networks Store (cotx-store.com)
NOTE4:
If the connector does not match for some reason, you can purchase a third-party conversion plug to solve the compatibility problem.
https://www.aliexpress.com/item/4000982991805.html
