Specifications: Bluetooth version: 5.0 + EDR ( Jieli chip ) 6965E Maximum power: 8W Battery capacity: 1,800mAh Charging time: 3 hours Music time: 8 hours Power display: supported Waterproof grade: IPX7 TWS ( 1 + 1 series connection ): 2 speakers can be connected in series wireless form a 2.0 sound effect Accessories: Manual, USB cable, Speaker