diff --git a/lib/readline-sync.js b/lib/readline-sync.js
index 64b0858..edb7e77 100644
--- a/lib/readline-sync.js
+++ b/lib/readline-sync.js
@@ -177,7 +177,7 @@ function _execSyncByFile(command, options) {
 }
 
 // for dev
-exports.useShellSet = function(use) { useShell = use; };
+//exports.useShellSet = function(use) { useShell = use; };
 
 exports.setPrint = function(fnc) { print = fnc; };
 
@@ -215,3 +215,12 @@ exports.question = function(query, options) {
 /* jshint eqnull:false */
     options);
 };
+
+exports.keyIn = function(message) {
+  return _readlineSync(
+/* jshint eqnull:true */
+    message != null ? message : '',
+/* jshint eqnull:false */
+    {keyIn: true});
+};
+
diff --git a/package.json b/package.json
index 4e6d5df..ebd55f7 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "readline-sync",
-  "version": "0.6.1",
+  "version": "0.7.0",
   "title": "readlineSync",
   "description": "Synchronous Readline",
   "keywords": [