From 257cf795bff57dfb19f84c8788779f3a43b82345 Mon Sep 17 00:00:00 2001
From: plampkin <83132062+plampkin@users.noreply.github.com>
Date: Sat, 24 Apr 2021 11:36:37 -0500
Subject: Update README.md

---
 README.md | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 4f507b8..c672f78 100644
--- a/README.md
+++ b/README.md
@@ -4,6 +4,8 @@ An open source photoreactor platfrom. 3D printed enclosure, commercially avaliab
 
 ![WPP photo](./coverart.jpg)
 
+A WPP device consists of a base, reaction module and reactor driver. The base houses the photon source and cooling fan. The reaction module consists of a  reaction chamber and  vessel holder. A digital driver board, analog driver board or simple circuit integrating a commercial light emitting diode (LED) driver can be fitted to the base to drive the reactor. Each component is highly versatile, and apparatus is fully modular.
+
 ## Repository
 
 This is an open source hardware project licensed under the CERN Open Hardware Licence Version 2 - Permissive.
@@ -40,4 +42,4 @@ See directory `photoreactor-tops` for our growing collection of reaction modules
 ## Electronics
 
 The WPP incorporates small custom circuit boards providing control over light intensity and fan speed.
-Please see the fabrication instructions for more detailed information.
\ No newline at end of file
+Please see the fabrication instructions for more detailed information.
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