Vtin Bluetooth 4.0 Speaker, Dual 10W Drives with Passive Radiator and Deep Bass for Bluetooth Enabled Devices - Pink 20W Powerful Drivers. Powered by dual ten watt drivers with a passive radiator, the VTIN Royaler speaker provides you dynamic and incredible sound with powerful volume. The passive subwoofer lets you enjoy the rich bass. Al Alloy Housing. Selection of high-strength aluminum alloy case and high precision CNC polished tech., the speaker is durable and sturdy. Anodic oxidation process makes it stylish, wearable. The thick rubber pads on the bottom prevent it from slipping. Bluetooth V4.0. Bluetooth pairing is simple, allowing you to connect your Bluetooth-enabled devices at the range of 33feet. The auxiliary port easily helps you connect your other devices without Bluetooth function. Just enjoy the high stereo sound. 8 Hours Playing Time. With a premium rechargeable 5000mAh polymer-Li-ion battery, it provides you 8 hours playing time at the volume of 50%. Portable size makes it easy to carry from room to room. Hands-free Calls. With built-in HD microphone and noise-cancellation tech., the speaker can filter the ambient noise to offer you a crystal clear speech. Possess VTIN Royaler Speaker, own a world of your own from roaring highs to deep lows.?