1. Ultra-relevant pro Sound with Sunter Bass: Do not let your small size deceive you. Go 4 is punching a serious musical. Your friends won't believe how big professional sounds come out of such a small speaker. The GO 4 gives up to 7 hours of game time on a single charge. Tap the game time increase to add 2 hours to your battery life. 3. and dust -proof: GO 4's IP67 waterproof and dust -proof rating allows this portable speaker to process almost every environment from a party to the coastal picnic. Match two go4s for stereo sound or connect multiple auracast speakers wirelessly using Auracast for larger sound. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store