Parameters: Mode: T8 Earphone Battery Capacity: 50mAh/ 3.7V Charging Case Battery Capacity: 700mAh/ 3.7V Standby hour: 1000 hour Call hour: 4 hour Music hour: 2.5 hour Charging time: 1 hour Loudspeakers unit: 8mm Parameters: Mode: T8 Earphone Battery Capacity: 50mAh/ 3.7V Charging Case Battery Capacity: 700mAh/ 3.7V Standby hour: 1000 hour Call hour: 4 hour Music hour: 2.5 hour Charging time: 1 hour Loudspeakers unit: 8mm