OUD provides high quality wireless speaker, it has wide compatibility: Cell Phones, Tablets, Laptops, Desktop, computer devices that supports wireless technology. Turn on this speaker, Source "NR-446" on your wireless device. TWS: It is an True Wireless Stereo speaker, supports 2 same devices wireless connection. FM Radio: delivers high sensitive radio signals. The speaker supports Aux audio in function with a 3.5mm auxiliary cable. Li-ion battery built in, 1200mAh capacity offers long playback time