QOLTEC 50158 Speaker Qoltec 3W Doubl 80051462 Product Description: Qoltec Double speaker - speaker - for portable use - wireless Product Type: Speaker - for portable use Media Content Source: Flash memory card Speaker Type: Active Continuous Power: 3 Watt Frequency Response: 90 - 20000 Hz Amplifier: Integrated Supported Memory Cards: microSD Interfaces: Bluetooth Colour: Black Power Options: USB charging Battery: Speaker battery rechargeable Manufacturer Warranty: 2-year warranty