Earbuds are a special type of earphone that uses True Wireless Stereo or TWS technology for connectivity. True Wireless Stereo (TWS) uses Bluetooth signals instead of wires or cables to transfer sound. Depending on the brand and type they support different Bluetooth versions. Namely Bluetooth 4.0, 4.1, 5.0, 5.1, and BT5Xe. TWS earbuds usually come with a holding case that also doubles as a charging case for the earbuds. The case has an inbuilt battery that can charge the earbuds multiple times and is used to charge the earbud. The case has either a micro USB or USB Type C PD port to charge its battery. There are a few Gaming TWS earbuds that feature specialized RGB lighting indicators.