Specification:

Model: F9
Bluetooth version: 5.0
Noise reduction version: CVC8.0
Battery capacity of the earphones: 50mAh
Charging box battery capacity: 3500mAh
Working distance: 10 meters
Auto On: support
Automatic pairing: support
Talk time: approx. 150 hours (used with the charging box)
Music time: approx. 150 hours (used with the charging box)
Charging times earphones AFTER charging box: About 25 times
Charging box input current: 5V 1A
Key light: red & blue
Ear bus material: PC
Function: Play / pause (single click), answer / hang up (single click), wake Siri (short press), volume control (press three times), switch songs (double click), on / off (long press for 5S)