Feature: 1. Core Upgrade And Bluetooth 5.0: The single bluetooth wireless earbud uses a Bluetooth chip with a higher version of 50, which significantly improves call performance, compatibility, and functionality, without any lag delay. 2. CVC8.0 Call Noise Reduction: The single ear wireless earbud uses CVC8.0 digital noise reduction technology to intelligently filter out the noise in the surrounding environment. Whether in public places such as buses, subways, or crowded areas, the communication between the two parties can be clearer. 3. 6D Sound Effect: Innovative titanium plating conforms to the diaphragm, which is more precise in handling music, bringing thick bass and delicate treble. The wireless Bluetooth earbud also has good sound quality. 4. Comprehensive Upgrading and Renovation: The depth of the mini bluetooth single earbud entering the ear is just right, and you won't feel bloating or pain after wearing them for a long time, providing a good sense of comfort. 5. Ergonomic Design: According to ergonomics, single ear wireless earbud deeply fits the ear canal to make the ears more comfortable and prevent them from falling off. 6. Free From Constraints of Wires: Music is not limited by wires, with a truly wireless design that can provide you with a free experience at any time. Specification: Item Type: Single Bluetooth Wireless Earbud Shell Material: Plastic Weight: Approx. 15g / 0.5oz Product Battery: 3.7V 80mAh Lithium Battery (Built In). Package List: 1 x Bluetooth Earbud1 x USB Charging Cable 1 x Manual