diff --git a/package.json b/package.json
index ee7b544a457a8ac515253ad9fdff3142d864f283..1aebb07a43cb7589dbb8ce370b7ff8c0e76ec84a 100644
--- a/package.json
+++ b/package.json
@@ -7,8 +7,10 @@
     "DEFAULT_HEAD": "phantomjs",
     "DEFAULT_PUPPET": "web",
     "DEFAULT_PROFILE": "default-profile-name",
-    "DEFAULT_PORT": 18788,
-    "DEFAULT_PUPPET_PORT": 28788,
+    "DEFAULT_PORT": 8788,
+    "DEFAULT_PUPPET_PORT": 18788,
+    "DEFAULT_PROTOCOL": "io|0.0.1",
+    "ENDPOINT": "wss://api.wechaty.io/v0/websocket",
     "BINARY_CHROMIUM": "/wechaty/bin/xvfb-chromium"
   },
   "scripts": {
@@ -76,7 +78,6 @@
     "body-parser": "^1.15.2",
     "chromedriver": "^2.23.1",
     "co": "^4.6.0",
-    "eventemitter2": "^2.1.0",
     "express": "^4.13.4",
     "npmlog": "^4.0.0",
     "phantomjs-prebuilt": "^2.1.12",
diff --git a/src/config.js b/src/config.js
index 11444ac33b5ffc4116a9e1d704038c3f215544e0..d827a19aaddfd4bc99089ebc0883be3946c4cbcf 100644
--- a/src/config.js
+++ b/src/config.js
@@ -1,8 +1,15 @@
 const Config = require('../package.json').wechaty
 
 Object.assign(Config, {
-  isDocker: !!process.env.WECHATY_DOCKER
-  , head: process.env.WECHATY_HEAD || Config.DEFAULT_HEAD
+  isDocker:   !!process.env.WECHATY_DOCKER
+  
+  , head:     process.env.WECHATY_HEAD      || Config.DEFAULT_HEAD
+  , puppet:   process.env.WECHATY_PUPPET    || Config.DEFAULT_PUPPET
+  , endpoint: process.env.WECHATY_ENDPOINT  || Config.ENDPOINT  // wechaty.io api endpoint
+  , port:     process.env.WECHATY_PORT      || 0 // 0 for disable port
+  
+  , profile:  process.env.WECHATY_PROFILE
+  , token:    process.env.WECHATY_TOKEN
 })
 
 module.exports = Config.default = Config.Config = Config
diff --git a/src/config.spec.js b/src/config.spec.js
index 7d4b4748dc76976ee7fb4e50bbb8de31cdf669b5..a96bb9db7c929cfaa124bc1d63548cee3f005d59 100644
--- a/src/config.spec.js
+++ b/src/config.spec.js
@@ -1,15 +1,26 @@
 import { test }   from 'ava'
 import { Config } from './config'
 
-test('Config Module Exports', t => {
+test('Config list vars & methods', t => {
   t.truthy(Config.default   , 'should export default')
   t.truthy(Config.Config    , 'should export Config')
 
-  t.true(typeof Config.isDocker !== 'undefined' , 'should identify docker env by isDocker')
+  t.true('isDocker' in Config, 'should identify docker env by `isDocker`')
+  t.true('head'     in Config, 'should exist `head` in Config')
+  t.true('puppet'   in Config, 'should exist `puppet` in Config')
+  t.true('endpoint' in Config, 'should exist `endpoint` in Config')
+  t.true('port'     in Config, 'should exist `port` in Config')
+  t.true('profile'  in Config, 'should exist `profile` in Config')
+  t.true('token'    in Config, 'should exist `token` in Config')
 
-  t.truthy(Config.DEFAULT_PUPPET  , 'should export DEFAULT_PUPPET')
-  t.truthy(Config.DEFAULT_PORT    , 'should export DEFAULT_PORT')
-  t.truthy(Config.DEFAULT_PROFILE , 'should export DEFAULT_PROFILE')
+  t.truthy(Config.DEFAULT_PUPPET      , 'should export DEFAULT_PUPPET')
+  t.truthy(Config.DEFAULT_PORT        , 'should export DEFAULT_PORT')
+  t.truthy(Config.DEFAULT_PROFILE     , 'should export DEFAULT_PROFILE')
+  t.truthy(Config.DEFAULT_HEAD        , 'should export DEFAULT_HEAD')
+  t.truthy(Config.DEFAULT_PUPPET_PORT , 'should export DEFAULT_PUPPET_PORT')
+  t.truthy(Config.DEFAULT_PROTOCOL    , 'should export DEFAULT_PROTOCOL')
+  t.truthy(Config.ENDPOINT            , 'should export ENDPOINT')
+  t.truthy(Config.BINARY_CHROMIUM     , 'should export BINARY_CHROMIUM')
 })
 
 
diff --git a/src/io.js b/src/io.js
index a1c43a9a16b31f848cf7efb83a1220334f0cc5ba..dbcb3ac09e6f5c9119e3086e26ab56cfaf060809 100644
--- a/src/io.js
+++ b/src/io.js
@@ -15,14 +15,15 @@ const co            = require('co')
 
 const log           = require('./npmlog-env')
 const Contact       = require('./contact')
+const Config        = require('./config')
 
 class Io {
 
   constructor({
     wechaty = null
     , token = null
-    , endpoint = 'wss://api.wechaty.io/v0/websocket'
-    , protocol = 'io|0.0.1'
+    , endpoint = Config.endpoint
+    , protocol = Config.DEFAULT_PROTOCOL
   }) {
     if (!wechaty || !token) {
       throw new Error('Io must has wechaty & token set')
diff --git a/src/wechaty.js b/src/wechaty.js
index d76542d257e5b674f4b57d2c6f66048c04ec14d2..264c62b89070ab5bf5605a278f74d1117e0686e4 100644
--- a/src/wechaty.js
+++ b/src/wechaty.js
@@ -22,12 +22,12 @@ const Config = require('./config')
 class Wechaty extends EventEmitter {
 
   constructor({
-    type        = process.env.WECHATY_PUPPET    || Config.DEFAULT_PUPPET
-    , head      = process.env.WECHATY_HEAD      || Config.DEFAULT_HEAD
-    , port      = process.env.WECHATY_PORT      || 0    // 0 for disable port
-    , endpoint  = process.env.WECHATY_ENDPOINT          // wechaty.io api endpoint
-    , token     = process.env.WECHATY_TOKEN             // token for wechaty.io auth
-    , profile   = process.env.WECHATY_PROFILE           // no profile, no session save/restore
+    type        = Config.puppet
+    , head      = Config.head
+    , port      = Config.port
+    , endpoint  = Config.endpoint
+    , token     = Config.token    // token for wechaty.io auth. will connect to wechaty.io cloud management if token is set
+    , profile   = Config.profile  // no profile, no session save/restore
   } = {}) {
     log.verbose('Wechaty', 'contructor()')