diff --git a/README.md b/README.md
index 07fd982..5b0555d 100644
--- a/README.md
+++ b/README.md
@@ -1,11 +1,5 @@
-<h2>Material referente as entregas dos desafios no curso de Back-End na Coderhouse Brasil</h2>
-
+<h1>Descrição:</h1>
 <hr>
-
-<h3> Aulas com entrega:</h3>
-<ul>
-<li>Aula 2 ( Classes com ECMAScript e ECMAScript avançado )</li>
-
-</ul>
-
-<span>Acesse as aulas pelas branches</span>
\ No newline at end of file
+<div>
+<p>05/12/2024 Desafio ( Classes com ECMAScript e ECMAScript avançado ) da Aula 2 ( Princípios básicos de Javascript e novos recursos ECMAScript ) do curso de Back-end na CoderHouse; Turma #63515 de 2024/25.</p>
+</div>
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..5425b6b
--- /dev/null
+++ b/package.json
@@ -0,0 +1,11 @@
+{
+  "name": "cursocoderhousebackend",
+  "version": "1.0.0",
+  "description": "aula 1 de back end",
+  "main": "productManager.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "Gustavo Rezende",
+  "license": "ISC"
+}
diff --git a/src/assets/productManager.js b/src/assets/productManager.js
new file mode 100644
index 0000000..a9e0cb6
--- /dev/null
+++ b/src/assets/productManager.js
@@ -0,0 +1,81 @@
+class ProductManager {
+    constructor() {
+      this.products = [];
+      this.currentId = 1;
+    }
+  
+    addProduct({ title, description, price, thumbnail, code, stock }) {
+      // Verification
+      if (!title || !description || !price || !thumbnail || !code || !stock) {
+        console.error("Error: All field are required.");
+        return;
+      }
+  
+      // Verification 
+      if (this.products.some((product) => product.code === code)) {
+        console.error(`Error: The code "${code}" already in use.`);
+        return;
+      }
+  
+      // Create
+      const newProduct = {
+        id: this.currentId++,
+        title,
+        description,
+        price,
+        thumbnail,
+        code,
+        stock,
+      };
+  
+      // Add List
+      this.products.push(newProduct);
+      console.log(`Product "${title}" added successfully.`);
+    }
+  
+    getProductById(id) {
+      const product = this.products.find((product) => product.id === id);
+      if (!product) {
+        console.error("Error: Product not found.");
+        return;
+      }
+      return product;
+    }
+  }
+  
+  // Test
+  const manager = new ProductManager();
+  
+  // Add product
+  manager.addProduct({
+    title: "Product 1",
+    description: "Product description 1",
+    price: 100,
+    thumbnail: "product1.jpg",
+    code: "P001",
+    stock: 10,
+  });
+  
+  manager.addProduct({
+    title: "Product 2",
+    description: "Product description 2",
+    price: 150,
+    thumbnail: "product2.jpg",
+    code: "P002",
+    stock: 5,
+  });
+  
+  // Try to add product with repeated code
+  manager.addProduct({
+    title: "Product 3",
+    description: "Product description 3",
+    price: 200,
+    thumbnail: "product3.jpg",
+    code: "P001",
+    stock: 8,
+  });
+  
+  // Search product by ID
+  console.log(manager.getProductById(1)); // Should return Product 1
+  console.log(manager.getProductById(3)); // Should return "Error: Product not found"
+  
\ No newline at end of file
diff --git a/src/index.js b/src/index.js
new file mode 100644
index 0000000..03576ed
--- /dev/null
+++ b/src/index.js
@@ -0,0 +1 @@
+// 404
\ No newline at end of file