T09 true wireless [standard version]:
Dual microphone intelligent noise reduction
15+5 hours battery life
Fingerprint touch

T09 upgrade version:
Master-slave switching dual master
15+5 hours battery life

Intelligent noise reduction

Talk time: about 5 hours
Music time: about 5 hours
Standby time: about 100 hours
Charging time: about 3 hours
Bluetooth version: BLUETOOTH V5.0

Support protocol: HSP / HFP / A2DP /AVRCP
Transmission range: 10M/ Class2
Headphone body battery: 50mAh*2 lithium polymer battery
Charging bay battery: 500mAh
Charging voltage and current: DC 5V, 500mA
Waterproof rating: IPX5