Magnetic Design: Built-in magnets allow you to attach the two headphones together and prevent the headphones from sliding off or the cables tangle when not in use. Comfortable To Wear: Different from the common Bluetooth neckband headphone, the buttons of T Energy are on the right to balance the left and right sides. This design combines the ergonomic theory, so that users are able to have a more wonderful wearing experience. 13mm Drivers: T Energy Bluetooth Headsets adopt the 13mm large diaphragm to make the bass powerful and flexible. Using Bluetooth 5.0 reduces power consumption. Long Battery Life: T Energy in-ear Earphones enable music for 12 hours. The large capacity battery brings you a long-lasting user experience. ANC Sweatproof Sport Headphones: Bluedio T Energy Sport Headphones adopt two microphones to eliminate the low-frequency noise in your life. With a water resistant and durable design, Bluedio T Energy prevent against sweat and moisture damage thanks to its water resistant material. It is the best choice for use while running, exercising, jogging, and biking. Bluetooth version: V5.0 Bluetooth operating range : up to 10m (free space) Transmission frequency range: 2.4GHz-2.48GHz Supported profiles: A2DP, AVRCP, HSP, HFP Driver units: 13mm Nominal impedance: 32?

response: 20Hz-20KHz Sound pressure level(SPL) : 116dB Standby time: up to 250 hours Bluetooth music/call time: up to 12 hours Pure ANC time: about 9 hours Fully charged time: about 1.5 hours Operating environment: -10 to 50? Charging voltage/current: 5V/>500mA Output power: 10mA+10mA What's in the box 1X Bluedio T Energy ANC Headphone, 2X Additional Headphone Rubbers, 1X USB Charging Cable, 1X User Manual