diff --git a/First-steps-into-APRS-over-LoRa.md b/First-steps-into-APRS-over-LoRa.md
index 5c52ec3..b1f204e 100644
--- a/First-steps-into-APRS-over-LoRa.md
+++ b/First-steps-into-APRS-over-LoRa.md
@@ -19,7 +19,7 @@ There are several bands, where different LoRa modules could operate:
 LoRa modules support various SF (spreading factors) and various bandwidths, table below summarizes possible options, with the maximum reasonable speed and signal level:
 - 433 MHz: ranging from 292 bps (SF9, -138 dbm) up to 1560 bps (SF6, -128 dBm) for legal 433 MHz 20kHz channel
 - 868/915MHz: ranging from 293 bps (SF12, -137 dbm) up to 9375 bps (SF6, -118 dBm) for legal 868 Mhz 125kHz channel
-- 2400Mhz: up to 2 Mbps, more information is not available
+- 2400Mhz: up to 2 Mbps, up to 27 dBm, E28-2G4M27S modules, https://www.manualslib.com/manual/1591128/Ebyte-E28-2g4m27s.html
 
 ![](https://github.com/sh123/esp32_loraprs/blob/master/images/bandwidth_vs_sf.jpg)