Nekteck NK-S1 Bluetooth Speakers 2.1 Channel Wireless Portable Speaker with Mic, Stereo 20W Premium Audio from 10W Drivers, 10W Subwoofer and Dual Passive Radiators, 2 Mode Equalizer - Black GREAT SOUND PERFORMANCE: The Nekteck Bluetooth Speaker delivers a powerful sound with 20 watts of power. It is built with amazing 2.1 channel system delivered by 10W drivers, 10W subwoofer and 2 passive bass radiator for a true home theatre sound in a compact, easy to use package. LATEST BLUETOOTH VERSION: This speaker is compatible with Bluetooth 4.1 and supports A2DP, HSP, HFP, AVRCP profiles agreement. It has a great connection range up to 10m or 33ft in distance. It also supports AUX external audio input so you can play music via wired connection. 6th GENERATION CVC TECHNOLOGY: The latest 6th generation CVC technology comes with high efficiency noise reduction and echo cancellation feature. It offers high quality sound experience. INDOOR AND OUTDOOR SPEAKER: Be thrilled with the Nekteck Bluetooth Speaker that offers 2 modes of music just right for you. Have a clear, cinematic sound while in a room or pump up the bass and audio output for any outdoor activities. LONG PLAYTIME: Enjoy 8 hours of playback time with 7.4V, 2000mAh battery built in the speaker, which allow you play up to 160 songs at mid-level volume on a single charge. (Playtime varies by volume level and audio content).