TESNA BUDS 4 ANC

TESNA Buds4 TESNA T1 Pro 12 nanometer multi-core chip ANC active noise reduction (sliding noise reduction depth of 40db) USB Type-C Charging time: About 1 hour (it is not recommended to use fast charging for a long time to charge the earphones) Working distance: 10 meters (accessible open environment) Listening time: About 4 hours (default state of spatial sound effects, 80% volume) Listening time with charging case: About 30 hours (left earphone + right earphone + charging case)