diff --git a/index.js b/index.js
index 108cb70..5a3cf2a 100644
--- a/index.js
+++ b/index.js
@@ -1,4 +1,3 @@
-var key = require('./lib/key');
 var tts = require('./lib/api');
 
 /**
@@ -7,11 +6,8 @@ var tts = require('./lib/api');
  * @param   {String}  text
  * @param   {String!} lang     default is 'en'
  * @param   {Number!} speed    default is 1, show = 0.24
- * @param   {Number!} timeout  default is 10000ms
  * @return  Promise(url: String)
  */
-module.exports = function (text, lang, speed, timeout) {
-  return key(timeout).then(function (key) {
-    return tts(text, key, lang, speed);
-  });
+module.exports = function (text, lang, speed) {
+    return tts(text, lang, speed);
 };
diff --git a/lib/api.js b/lib/api.js
index 9514a28..8d4c931 100644
--- a/lib/api.js
+++ b/lib/api.js
@@ -1,5 +1,4 @@
 var url = require('url');
-var token = require('./token');
 var host = 'https://translate.google.com';
 
 /**
@@ -11,7 +10,7 @@ var host = 'https://translate.google.com';
  * @param   {Number!} speed  show = 0.24, default is 1
  * @return  {String}  url
  */
-module.exports = function (text, key, lang, speed) {
+module.exports = function (text, lang, speed) {
   if (typeof text !== 'string' || text.length === 0) {
     throw new TypeError('text should be a string');
   }
@@ -20,10 +19,6 @@ module.exports = function (text, key, lang, speed) {
     throw new RangeError('text length (' + text.length + ') should be less than 200 characters');
   }
 
-  if (typeof key !== 'string' || key.length === 0) {
-    throw new TypeError('key should be a string');
-  }
-
   if (typeof lang !== 'undefined' && (typeof lang !== 'string' || lang.length === 0)) {
     throw new TypeError('lang should be a string');
   }
@@ -40,8 +35,7 @@ module.exports = function (text, key, lang, speed) {
       total: 1,
       idx: 0,
       textlen: text.length,
-      tk: token(text, key),
-      client: 't',
+      client: 'tw-ob',
       prev: 'input',
       ttsspeed: speed || 1
     }
diff --git a/package-lock.json b/package-lock.json
index d62a68d..10c4cd1 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "google-tts-api",
-  "version": "0.0.4",
+  "version": "0.0.5",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/test/long-characters.test.js b/test/long-characters.test.js
index 7ec2269..d2a9e41 100644
--- a/test/long-characters.test.js
+++ b/test/long-characters.test.js
@@ -8,7 +8,7 @@ describe('Long Characters', () => {
       'The Industrial Revolution had several roots, one of which was a commercial revolution that, beginnin' +
       'g as far back as the sixteenth century, accompanied Europe’s expansion overseas.';
 
-    const url = await tts(text, 'en');
+    const url = tts(text, 'en');
     const res = await fetch(url);
     expect(res.status).toBe(200);
   });
@@ -18,7 +18,7 @@ describe('Long Characters', () => {
       'The Industrial Revolution had several roots, one of which was a commercial revolution that, beginnin' +
       'g as far back as the sixteenth century, accompanied Europe’s expansion overseas. exports and imports';
 
-    const url = await tts(text, 'en');
+    const url = tts(text, 'en');
     const res = await fetch(url);
     expect(res.status).toBe(200);
   });
@@ -29,7 +29,9 @@ describe('Long Characters', () => {
       'g as far back as the sixteenth century, accompanied Europe’s expansion overseas. Both exports and im' +
       'ports showed spectacular growth, particularly in England and France.';
 
-    await expect(tts(text, 'en')).rejects.toThrow('should be less than 200 characters');
+    expect(()=>{
+      tts(text, 'en');
+    }).toThrow('should be less than 200 characters');
   });
 
   it('Chinese: 193 characters', async () => {
@@ -39,7 +41,7 @@ describe('Long Characters', () => {
       '可以迅速被沉积物掩埋的地方，摆脱被完全摧毁的几率便会大大增加。海底通常就具有上述的两方面条件，这里生' +
       '活着很多带壳的无脊椎动物（没有脊椎的动物），不断累积的似雨的沉积颗粒会把它们掩埋起来。';
 
-    const url = await tts(text, 'zh');
+    const url = tts(text, 'zh');
     const res = await fetch(url);
     expect(res.status).toBe(200);
   });
@@ -51,7 +53,7 @@ describe('Long Characters', () => {
       '可以迅速被沉积物掩埋的地方，摆脱被完全摧毁的几率便会大大增加。海底通常就具有上述的两方面条件，这里生' +
       '活着很多带壳的无脊椎动物（没有脊椎的动物），不断累积的似雨的沉积颗粒会把它们掩埋起来。虽然多数的化石';
 
-    const url = await tts(text, 'zh');
+    const url = tts(text, 'zh');
     const res = await fetch(url);
     expect(res.status).toBe(200);
   });
@@ -64,6 +66,8 @@ describe('Long Characters', () => {
       '活着很多带壳的无脊椎动物（没有脊椎的动物），不断累积的似雨的沉积颗粒会把它们掩埋起来。虽然多数的化石' +
       '是在海洋沉积岩中发现的';
 
-    await expect(tts(text, 'zh')).rejects.toThrow('should be less than 200 characters');
+    expect(()=>{
+      tts(text, 'zh');
+    }).toThrow('should be less than 200 characters');
   });
 });
diff --git a/test/param.test.js b/test/param.test.js
index 2a087ce..207a994 100644
--- a/test/param.test.js
+++ b/test/param.test.js
@@ -2,39 +2,35 @@ const tts = require('..');
 jest.setTimeout(60000);
 
 describe('parameters', () => {
-  it('text = null', async () => {
-    await expect(tts(null)).rejects.toThrow('text should be a string');
+  it('text = null',  () => {
+     expect(()=>{tts(null);}).toThrow('text should be a string');
   });
 
-  it("text = ''", async () => {
-    await expect(tts('')).rejects.toThrow('text should be a string');
+  it("text = ''",  () => {
+     expect(()=>{tts('');}).toThrow('text should be a string');
   });
 
-  it('text = 123', async () => {
-    await expect(tts(123)).rejects.toThrow('text should be a string');
+  it('text = 123',  () => {
+     expect(()=>{tts(123);}).toThrow('text should be a string');
   });
 
-  it('lang = null', async () => {
-    await expect(tts('test', null)).rejects.toThrow('lang should be a string');
+  it('lang = null',  () => {
+     expect(()=>{tts('test', null);}).toThrow('lang should be a string');
   });
 
-  it("lang = ''", async () => {
-    await expect(tts('test', '')).rejects.toThrow('lang should be a string');
+  it("lang = ''",  () => {
+     expect(()=>{tts('test', '');}).toThrow('lang should be a string');
   });
 
-  it('lang = 123 (number)', async () => {
-    await expect(tts('test', 123)).rejects.toThrow('lang should be a string');
+  it('lang = 123 (number)',  () => {
+     expect(()=>{tts('test', 123);}).toThrow('lang should be a string');
   });
 
-  it('speed = null', async () => {
-    await expect(tts('test', 'en', null)).rejects.toThrow('speed should be a number');
+  it('speed = null',  () => {
+     expect(()=>{tts('test', 'en', null);}).toThrow('speed should be a number');
   });
 
-  it("speed = '123'", async () => {
-    await expect(tts('test', 'en', '123')).rejects.toThrow('speed should be a number');
-  });
-
-  it('timeout = 10 ms (too short to success)', async () => {
-    await expect(tts('test', 'en', 1, 10)).rejects.toThrow('network timeout');
+  it("speed = '123'",  () => {
+     expect(()=>{tts('test', 'en', '123');}).toThrow('speed should be a number');
   });
 });