MiFa A4 Bluetooth 5.0 shower speaker is IPX7 waterproof, wireless, with hands-free calling. With IPX7 waterproof level you can enjoy your favorite music in the shower or anywhere. Just stick the suction to a smooth surface. The MiFa A4 supports a Micro SD card, MP3 and WMA format. The built-in 1200mAh lithium battery allows 8 hours of play time on medium volume, and the charging time is approximately 3 hours. This little speaker has an amazing sound.