diff --git a/README.md b/README.md
index d1cf4fd..ff2d7c9 100644
--- a/README.md
+++ b/README.md
@@ -1,10 +1,12 @@
 # NRF51822 AQI Sensor Test Program
 
+*** NOTE: THIS APPLICATION IS FOR _xxAC VERSION ONLY NOW, DUE TO LACK OF SRAM ***
+
 ## Work in progress:
 - [x] LEDs and buttons
 - [ ] Power management
 - [x] FreeRTOS
-- [ ] BLE API
+- [x] BLE API
 - [ ] Sensors
 
 ## How to compile?
@@ -33,7 +35,7 @@ Due to incompatible flash algorithm issue.
     * Use SEGGER RTT logger API.
 
 ## Boards supported:
-* Waveshare BLE-400 board, w/ NRF511822 module
+* Waveshare BLE-400 board, w/ NRF51822 module
 * Some strange AQI sensor board.
 
 ## DFU support: