😍UiiSii B1 Wireless Sports Earphone 😍 #New subwoofer fashion sports wireless Bluetooth 5.0 in-ear earphones IPX5 waterproof and sweat-proof headphones 1. Equipped with bluetooth version 5.0 and CSR bluetooth chip in the UK, the wireless connection is more stable, the power consumption is lower, and it is compatible with more bluetooth devices. 2.IPX5 sweat and waterproof design: rain and sweat proof. You can exercise and enjoy music on windy and rainy days. 3. Wearable design: the whole headset has rich music expressive force, in the composite ergonomic design, flexible TPU collar, back and shoulder wear, left and right balance design.