Please Note: There is NO volume controller on the speaker， you can control volume via smartphones or tabletsTechnology Meets DesignSimple and contemporary design， compact dimensions paired with an impressive sound performance - everything in this speaker. The product was made of sustainable and environment friendly ABS plastic. This sound wonder features a high-quality surface and precise and sophisticated workmanship. What's more， the retractable and durable stand firmly holds your iPad and iPhone at a comfortable viewing angle. Turn up the MusicThe built-in 3.5mm inlet supports surround sound signals on the highest level. The device supports any kind of media playback: music， games， movies or net-based media streaming. The built-in microphone is ideal for clear conversations - answer and end calls with only one button. Even a high sound frequency guarantees crystal-clear sounds and two robust rubber feet at the bottom reduce vibration.Dual-connection in Both Wired and BluetoothConnect with any bluetooth-enabled device (Bluetooth 2.1 and over) or just plug in with the traditional 3.5mm audio cable to start your tunes， offer dual-connection in both wired and wireless， and it's just that simple， plug and play. It also supports Macintosh as well as Windows PCs. A power button and the other interfaces are built into the back of the device: optimal arrangement and space utilization.SpecificationsSupported wireless modes: Bluetooth and EDRSignal distance: up to 10m (signal conditions may vary or be less favorable due to interfering signals)Battery: Li-Ion cell， capacity -> 800 mAhEffective performance: 5 Watts x2Measurements: 240 mm x 62 mm x 41 mmAttention: Please rest assured that the LED of BP2001 remains the same when charging and fully charged， which takes 3~4 hours with 5V/1A power adapter