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Product Parameters: Charging: MicroUSB Uses: Portable Audio Player, Mobile Phone, Computer Materials: Aluminum housing Special Features: Wireless and Portable Speaker, TF card mode, Speakerphone mode Product Type: R9 Product Size:3.3 x 3.3 x 1.6 inches (83x83x40mm) Speaker Diameter: 1.8 inches (45mm) Speaker Weight: 245g Shell Material: Aluminum alloy Bluetooth version: V4.1 Charging voltage: 5V 500MA Frequency response: 90HZ-18KHZ Music duration: about 8 hours Signal range of 10 meters Output power: 3W USB power input: DC-5V Packing List: 1 * Speaker 1 * Antenna/Shunt data cable (3.5mm audio and USB data cable)