diff --git a/content/notes/07-location-sensors.md b/content/notes/07-location-sensors.md
index 2fb752204..4f3bc8995 100644
--- a/content/notes/07-location-sensors.md
+++ b/content/notes/07-location-sensors.md
@@ -199,7 +199,8 @@ Fingerprinting services using Wifi
 		- Notification possible to avoid polling 
 	- Bidirectional communication 
 		- Not primarily focus, mostly for setting parameters
-
+> [!INFO] beacons send out theur UUID periodically, does not use much battery, low bandwith
+> sensors send out some data with the UUID
 
 - Location and Proximity Sensing using Bluetooth LE 
 	- One beacon (e.g. per room) 
@@ -209,8 +210,8 @@ Fingerprinting services using Wifi
 		- Range calculation using Received Signal Strength Indicator (RSSI) and calibrated transmitter power (txPower = RSSI at 1m) 
 		- Trilateration using several beacons but not very accurate 
 - Range different for beacons but typically between 20-50m (rarely 100m)
-
 ![](https://i.imgur.com/Xqh7cp0.png)
+> [!INFO] can locate things using similar techniques to cell towers
 
 
 - Different protocols on top of Bluetooth LE 
diff --git a/content/notes/info-305.md b/content/notes/info-305.md
index 315f65cab..af4dd4bfe 100644
--- a/content/notes/info-305.md
+++ b/content/notes/info-305.md
@@ -21,6 +21,6 @@ tags:
 - [x] [[04-lens-studio]]
 - [x] [[05-pervasive-ubiquitious-2]]
 - [x] [[06-challenges-for-ubicomp-and-intro-to-sensors]]
-- [ ] [[07-location-sensors]]
+- [x] [[07-location-sensors]]
 
 # Info
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