Okazi Portable Hi-fi Bluetooth Wireless Bluetooth& Speakers Watch Style Subwoofer Stereo Universal Mini Speaker with Anti-lost ,Selfie, USB and Tf Card Slot for Any(White) Cellphone Anti-lost function,to find your phone more easily. This is also a self-timer remote control shutter. Support A2DPWith USB and TF card slot, you can play mp3 / mp4 format files in the USB Flash Disk /TF card Wear this watch when driving, and easily enjoy the hand-free calls. In addition, this could be used as a self-timer, use remote control to take a photo. Comfortable smooth watchband, make your running or sporting enjoyable.