Bluetooth 4, also known as Bluetooth Low Energy (BLE), works by using a low-power wireless technology to enable devices to communicate with each other over short distances. It operates on the 2.4 GHz ISM band and uses a technique called frequency hopping to avoid interference from other wireless devices. Bluetooth 4 is designed to be energy efficient, making it ideal for devices with limited power sources such as wearables, sensors, and other IoT devices. It also uses a connectionless broadcasting mode, allowing devices to transmit data without establishing a connection, which further reduces power consumption. **

To return an item at Lightinthebox, you will need to first log in to your account and go to the "My Orders" section. Find the order that contains the item you want to return and click on "Return & Refund" to start the return process. Follow the instructions to select the item you want to return and the reason for the return. After submitting the return request, you will receive further instructions on how to send the item back and receive a refund or exchange. **

Bluetooth 4 for the PC refers to the fourth version of the Bluetooth technology that is specifically designed for use with personal computers. It provides a wireless connection for peripherals such as keyboards, mice, headphones, and speakers, allowing for easy and convenient connectivity without the need for cables. Bluetooth 4 for the PC also offers improved energy efficiency, faster data transfer speeds, and enhanced security features compared to previous versions, making it a popular choice for PC users looking to connect their devices wirelessly. **

To return a dress from Lightinthebox, you will need to first log in to your account on their website and go to the "My Orders" section. Find the order containing the dress you want to return and click on the "Return & Refund" button. Follow the instructions provided to select the reason for the return and submit your request. You will then receive further instructions on how to return the dress, including the return address and any additional requirements. Make sure to carefully package the dress and send it back within the specified timeframe for a refund or exchange. **

At Lightinthebox, the return process is fairly straightforward. Customers can initiate a return within 14 days of receiving their order by contacting customer service and providing the necessary information. Once the return is approved, customers can then ship the item back to the designated return address. After the returned item is received and inspected, a refund will be issued to the original payment method. It's important to note that certain items may not be eligible for return, so customers should review the return policy before initiating a return. **

I'm sorry, but I don't have access to specific information about your order at Lightinthebox. However, you can check the status of your order by logging into your Lightinthebox account and navigating to the "My Orders" section. From there, you should be able to see the current status of your order, including whether it has been processed, shipped, or delivered. If you have any concerns about your order, you can also reach out to Lightinthebox customer service for assistance. **

Without more specific information, it is difficult to determine if the Bluetooth headphones are broken after 4 months. However, it is possible that they could be malfunctioning due to wear and tear, battery issues, or other technical problems. It is recommended to troubleshoot the headphones or contact the manufacturer for assistance in determining the issue and potential solutions. **

To connect 4 Bluetooth speakers simultaneously, you will need a device that supports multi-point Bluetooth connectivity, such as a smartphone or a tablet. First, make sure all the speakers are in pairing mode. Then, go to the Bluetooth settings on your device and search for available devices. Once the speakers appear on the list, select and pair each one of them. Some devices may have a limit on the number of simultaneous Bluetooth connections, so make sure to check the specifications of your device before attempting to connect 4 speakers at once. **