REMAX RB-M55 Bluetooth Wireless Portable Speaker is compatible with any smartphone. Bluetooth speaker comes with a lanyard for portability. There are RGB lights to add beauty. The material is ABS plastic, thick and strong. Covered with fabric able to connect two speakers at the same time, True wireless stereo. With a built-in mic, can receive voice calls through the speaker. There is a light to show the working situation and show the battery percentage output.