Material: Iron+ABSColor: BlackSpecification Bluetooth Version: Bluetooth 2.1， support A2DP V1.2Operating Range: 10mTotal Power: 3WChannels: 1.0 Interface: 3.5mm /USB 2.0 Speaker unit: diameter 40mm， 4?，Supports Card Type: TFSupports TF Card Reader， Music format: MP3/WAVBattery voltage: 3.7V DCBuilt-in Battery Capacity: 500mAh Battery Type: Li-ion battery Music Play Time: 4-6HoursCharging time: 3HoursPlug Specifications: USBProduct Features:Metal shell design， strong，durable， shockproof， drop resistance;High-tech bluetooth technology， 10 m wireless connection;Supports TF Card Reader and MP3， WAV music format;With hand-free phone call answer function;Compact size， mini protable， is convenient to carry.Packing list:1 x Bluetooth Speaker1 x USB Power Cable£¨60cm£©1 x 3.5mm Audio Cable(60cm)1 x Pouch1 x Chinese User Manual