Product information: 

Bluetooth Version: V5.0+Br+Edr+Ble
Bluetooth Distance: 10 Meters
Rechargeable Battery: 400mah
Charging Time: About 1 Hour
Headphone Battery Capacity: 40mah
Headphone Charging Time: About 1 Hour
Standby Time: About 120 Hours
Talk Time: About 5 Hours
Music Playback Time: About 5-6 Hours
Voice Prompt: Support