diff --git a/docs/en/t_beam_supreme/t_beam_supreme_hw.md b/docs/en/t_beam_supreme/t_beam_supreme_hw.md
index ed04dfc..45cbd6e 100644
--- a/docs/en/t_beam_supreme/t_beam_supreme_hw.md
+++ b/docs/en/t_beam_supreme/t_beam_supreme_hw.md
@@ -207,7 +207,7 @@
 | Features            | Details                       |
 | ------------------- | ----------------------------- |
 | RF  Module          | LR1121                        |
-| Frequency range     | 830~945MHz，2.4~2.5GHz        |
+| Frequency range     | 830-945MHz，2.4-2.5GHz        |
 | Transfer rate(LoRa) | 0.6 K~300 Kbps@FSK@ Sub1G     |
 | Transfer rate(FSK)  | 0.018 K~62.5 Kbps@LoRa@ Sub1G |
 | Transfer rate(FSK)  | 0.476 K~101.5 Kbps@LoRa@ 2.4G |