Specifications: Model Number: T280 TWS BT Version: 5.0 Wireless Range: Up to 33 feet / 10 meters Drive Unit: 6.0mm Speaker Frequency Range: 5Hz-25KHz Water Resistant: Yes, IPX5 Charging Box Battery Capacity: 350mAh Music Time: Up to 4 hours battery, extra 12 hours with charging case Charging Time: about 2 hours Color: Blue, Red Headset Weight: 5.2g Each