diff --git a/README.md b/README.md
index c0b355e..24f0c40 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,13 @@
 # charge-limiter
 Set charge limit for MacBooks.
 
+## Description
+
+This utility is written in Javascript Application Scripting (or JXA) using Apple's Script Editor.
+
+The source code can be viewed by opening `src/charge-limiter.app` in Script Editor. This file is different from the `charge-limiter.app` provided in the [release](https://github.com/godly-devotion/charge-limiter/releases) page.
+
+The companion `smcutil` binary was copied from [this repository](https://github.com/sicreative/BatteryStatusShow/blob/master/BatteryStatusShow/smcutil/Products/usr/local/bin/smcutil). The source code for `smcutil` is also available there.
+
+## Releases
 Download the latest version from the [releases](https://github.com/godly-devotion/charge-limiter/releases) page.