diff --git a/README.md b/README.md
index 6da7034..dd39d99 100644
--- a/README.md
+++ b/README.md
@@ -10,13 +10,20 @@ The W800 is a pretty interesting chip with impressive characteristics for its pr
 ### Core :  
 * 32bit XT804 CPU
 * 240 Mhz max clock  
+
 ### Memory :
 * 2 MB on chip flash
-* 288 KB RAM, ~130 KB available to the user  
+* 288 KB RAM, ~130 KB available to the user
+
 ### Wireless connectivity :
 * Bluetooth EDR(Classic) and BLE 4.2
 * WiFi 2.4Ghz 802.11 b/g/n
 
+### SDK & OS
+* FreeRTOS v10.4.1
+* BLE stack : NimBLE
+* TCP IP stack : lwip v2.1.3
+
 ## Getting started :
 ### So, you'd like to try this project yourself ?
 ### Here are the steps to follow, in order to build the firmware and flash the board :
@@ -192,7 +199,7 @@ using a magnetic 4 pin plug.
 * [ ] Fix the issue with the DW01A chip, should be as easy as to replace the 100nf C12 cap with a lower value, let's say 80nf.
 ## To do - SOFTWARE
 * [X] Finish to design the settings page.
-* [ ] Implement watch settings persistency using the integrated flash memory
+* [X] Implement watch settings persistency using the integrated flash memory
 * [ ] Implement a good algorithm to handle adaptiv MCU clock 
 to save power
 * Drivers: