DT9 stereo headphones

Bluetooth version: V5.0 dual call
Headphone battery capacity: 55MAH / 3.7
Charging compartment: 300MAH / 3.7V
Standby time: one ear standby: 120 hours
Talk time: 4 hours
Speaker unit: 6MM true copper ring speaker
Music time: 3 hours
Bluetooth distance: 10-15 meters
Charging time: 1 hour