diff --git a/README.md b/README.md
index d2f1045..62893ff 100644
--- a/README.md
+++ b/README.md
@@ -22,16 +22,27 @@ Possible choices :
     * MPU6050
     * BMI160
     * LSM6DS3
-* A magnetometer :
-    * HMC5883L
+    * BMA456 <-- SELECTED i2c addr : 0x18 or 0x19 7 bit address, has the wrist tilt detection feature.
+* A magnetometer (possible choices):
+    * HMC5883L <-- SELECTED i2c addr : 0x1E 7 bit address, better soldering footprint
     * QMC5883L
     * LSM303DLHC
+    * BMM150 <-- Package with balls, hard to handle
 * An air pressure/temperature sensor (to display the altitude for example)
-    * BMP280
+    * BMP280 <-- SELECTED i2c addr : 0x76 or 0x77
 
 ## Actuators :
 * A vibration motor to notify events to the user.
 
+## Power source :
+* 1 cell lipo battery
+* A charge controller
+
+## Screen + touch element :
+* Screen with touch : STP240240_R130A1(T), SPI interface 240*240 px, ST7789V driver.
+* Touch element i2c addr : 0x46, IT7257 I2C touch driver
+
+
 ## MCU Pin assignement table :
 | Pin Number | Pin Name | Type | Function | Pull UP/DOWN| Connected to | Comment |
 |------------|----------|------|----------|-------------|--------------|---------|