【High Sound Quality】 The Liberty 4 utilizes ACAA technology to achieve clear sound quality. You can enjoy music in high quality. 【Long Battery Life】 With a 28-hour battery life, you can use them for extended periods. Using the charging case allows for even longer enjoyment. 【Comfortable Fit】 CloudComfort technology provides a comfortable fit. The design is fatigue-resistant, even during long hours of use. - Brand: soundcore by Anker - Model Name: Liberty 4 - Wireless: True Wireless Earphones - Bluetooth Version: Bluetooth 5.3 - Water Resistance: IPX4 - Battery Life: 28 hours - App Support: Yes, with protective case - Accessories: Charging case, USB-C cable, Instruction manual - Charging Method: USB Type-C Thank you for viewing.