TryAce Portable Boombox NFC Wireless Bluetooth Speaker, Ultra Bass Booster/Power Crystal-Clear Sound/Subwoofer Sound Effect/Rechargeable Battery (Red) The waterproof Bluetooth speaker built-in Bluetooth wireless transmission, hands-free calling function, AUX audio input,TF card playback,NFC function,USB flash drive playback, FM radio function. The speaker has NFC function to support the NFC mobile phone to enter the sensing area, and the Bluetooth function is automatically turned on. Built-in metal stable structure like tumbler,can keep standing and make the display screen face with people at 45 degree. The special sound cone design of the 3D surround sound effect provides a unique sound. The small size allows you to carry your speakers with you.