A9 Pro Wireless bluetooth headphones TWS High Quality Earbuds

Bluetooth version: 5.4 Company model: A9 Pro: (ANC+ENC) Chip master-slave switching: Ai dual engine (dual master ears, no master-slave) Charging case function: buzzer prompt sound + lanyard Function: Slide the volume up and down +-single ear anti-loss alarm Pressure: Pressure In-ear detection: somatosensory Head-tracking spatial audio: None Housing: Metal hinges Speaker: F13 composite titanium mold Headphone battery: 35mAh ordinary battery Charging case battery: 350mAh Wireless charging: Not supported Headset battery life: 4.5 hours (without noise cancellation) Comprehensive battery life of the charging case: 36 hours Standby time: 6 months+ in a fully charged state ANC Active Noise Cancellation: Noise Reduction Decibel: 32db or more