Wotmic Bluetooth Speakers Portable Outdoor Wireless Speaker with LED Light Support TF Card and Hand-Free Call System Black (Purple & Black) Bluetooth 4.0: Bluetooth provides the wireless and stable connection. With the microphone USB charging wire, provides external audio input play. Support SD/TF Card: With SD/TF inside the device and under the USB state to short press on-off button can switch function. Then it will play music from TF card (TF card not included) directly. Lantern Mode LED Light: Short press the light button can switch the lantern to various colors. According to your own personal preference, you can select any mode of lantern.Make the melody to change with delicate change of the lyrics. Hands-Free Call System: Users will be able to make clear phone calls with the speaker from its built-in microphone and hands-free call system. Enjoyable Music Venture: Portable design make this wireless stereo speaker is really convenient to take wherever you go.Play your favorite tunes on the go in clear, full audio.