Bluetooth Speakers Dylan&trade; Cocoon Portable Bluetooth Speakers with Nfc, Wireless Speaker System / Portable Speakers with 1800mah Li-ion Battery, Ultra Bass Booster, Powerful Crystal-clear Sound, Subwoofer Sound Effect / Built in Mic for Calls / for Smart Phones and Tablets / Laptops / Pc Computers / Mp3 Players (Black) Experience your tunes in high definition and surprising fullness realized through a 5Wx2 river and bass port - outclassing other similar-sized portable speakers ,Internal MaxAudio 3.0 digital IC accurately restore compressed audio file and play original music. Built-in Li-Ion Rechargeable Battery for up to 7hours of playtime. Built-in microphone for hands-free speaker phone calling Easy to pair - No code/pin needed Standard NFC near field communication technology make hard things simple,rapidly connect withBuetooth, ?New developing high performance NdFeB mixed magnetic,50mm speaker. very sensitive touch key,it makes very easy for your operation; otstanding connection range of up to 33 feet. Built-in microphone with a 2-feet pickup range allows the speaker to double as a speaker phone. Package contents: Dylan?COCOON Portable Bluetooth Speaker, micro USB cable, audio cable, instruction manual. 18-month warranty and free lifetime technical support.