Main functions: Bluetooth, call, USB TF Product material: ABS+ transparent material + cover cloth; Bluetooth specification: Jerry Bluetooth version 5.3; Transmission distance: ≤10M Speaker specifications: 2 speakers +1 diaphragm; Power amplifier specification: 4 ohms 10 watts; Battery specification: 1800MA with protection plate; Playback time: 2.5-3 hours Product size: Diameter 8.2 CM, height 24.6CM; Product net weight: 665G Colour: Black, blue, red, gray, purple Packaging size: 26.5*10.5*10.5CM Weight of each set: 770G Accessory contents: Instruction manual, data cable; Outer box size: 54*33*55 Quantity per box: 30/PCS Weight per box: 26KG