diff --git a/static/js/shop_data.js b/static/js/shop_data.js
index 3aa1168..0e8cc1f 100644
--- a/static/js/shop_data.js
+++ b/static/js/shop_data.js
@@ -635,7 +635,8 @@ const shop_data = {
         'The upconverter is optional, if you would like the baseband version please leave us a note.'
       ],
       options: [
-        {type: "SwitchLine", args: {title: "Ext CLK", outvar: "ext_clk", fallback: {text: "125 MHz", checked: false}}}
+        {type: "SwitchLine", args: {title: "Ext CLK", outvar: "ext_clk", fallback: {text: "125 MHz", checked: false}}},
+        {type: "Radio", args: {title: "Variant", outvar: "variant", variants: ["Baseband", "Upconverter"], fallback: 1}},
       ],
       size: 'small',
       type: 'urukul',