It sounds like you're looking for a 2-in-1 USB Wi-Fi adapter that supports both 2.4GHz Wi-Fi and Bluetooth 4.0. These adapters typically serve dual purposes, allowing you to connect to Wi-Fi networks while also enabling Bluetooth functionality, all through a single USB port.

Here’s a general breakdown of what to expect from such a device:

Key Features:

1. Wi-Fi Connectivity (2.4GHz):

   • Wi-Fi 802.11b/g/n: This supports standard Wi-Fi speeds on the 2.4GHz frequency band. Though it’s not as fast as newer Wi-Fi standards (like 5GHz or Wi-Fi 6), it’s widely compatible and sufficient for most basic tasks like web browsing, streaming, and online gaming.

2. Bluetooth 4.0:

   • Bluetooth LE (Low Energy): This is a power-efficient version of Bluetooth ideal for connecting peripherals such as wireless keyboards, mice, headphones, speakers, and even some smart devices.
   • Range: Typically, Bluetooth 4.0 devices have a range of about 30 feet (10 meters), but this can vary depending on obstacles and interference.

3. USB Connectivity:

   • Plug-and-play via USB, typically compatible with both Windows and macOS devices.
   • Small form factor, so it's portable and easy to store when not in use.

4. Dual Purpose:

   • Wi-Fi: Allows your computer or device to connect to wireless networks, especially useful for desktops or laptops without built-in Wi-Fi or with weak internal adapters.
   • Bluetooth: Adds Bluetooth support to PCs that don't have Bluetooth capabilities, enabling wireless connections with Bluetooth-enabled devices.