Welcome to my shop new retail. Bluetooth speaker with durable aluminum Metal case design. The speaker is in cylinder shape, portable and reliable. Easy operation by Bluetooth connection and button control. It supports music formats of MP3 and WMA. It supports TF card, USB playback, Bluetooth call, FM mode and file playback as well. Product type: Bluetooth Speaker Material: Metal Power Supply: DC 5V Battery: Lithium Battery 300mAh (Included) Effective Power: 3W Speaker Unit: 45mm Frequency: 90Hz-20KHz Audio Interface: 3.5mm Impedance: 4ohms Play Time: about 2 Hours Bluetooth Version: Bluetooth 3.0 Working Frequency: 2402-2480 MHz Wireless, Cylinder Shape, Button Control, Portable Size: 10cm x 8cm x 8cm/3.94 x 3.15 x 3.15 (Approx.) Warm prompt: Transition: 1cm=10mm=0.39inch Because of different monitors and lamplight,the picture may not reflect the actual color of the item,really thank you for your kind understanding As different measuring methods,it will occur 1-3 cm deviation about the items,please ensure that it is okay for you before ordering. Package Content: 1 x Bluetooth Speaker 1 x Audio Cable 1 x Data Cable