Frequency range: 2.4GHz-2.48GHzTransmission power: Class 2Operating voltage: 3.6VOperating current: ＋25mAStandby current: ＋0.5mATransmission distance: Max.10M(open space)Head size: 66mm (L)*14.6mm (W)*20mm (H)Music time: About 4HCharging time: 1H-2HTalking time: About 3HStandby time: About 100H