Venstar Wireless Speakers, Portable Bluetooth Speaker with 2x 3W Enhanced Bass Surround Sound Speakerphone Built-in Mic NFC CSR for Outdoor Indoor Sports Hiking Walking Camping Picnic Taco shape maximizes the sound quality and energy efficiency. Bluetooth and built-in microphone, make hand free phone callings easy and clear. Instant and easy pairing with Bluetooth-enabled devices, serves a wide range of devices, smartphones, tablets and PC Dual 3W acoustic chambers & radiators speaker delivers, designed to deliver ultimate rich and powerful sound and deep extreme booming bass. Totally light and portable, the carry case comes with a handy carabiner to attach it easily to your backpack, Its durable, water and shock resistant, easy to enjoy soaring high music, great for party, gathering, picnic, camping, sports, entertainment. NFC function allows easier Bluetooth operation (with Bluetooth 4.0 technology and professionally tuned 50mm drivers). Better 1400mAh rechargeable battery support 8+ hours longer ultimate joy.