IPX4 Rated water resistant is safe by the water. TWS function - tstereo sound using another compatible speaker. Mic input lets you connect a microphone for more fun. Optimized for voice assistant control. Three different RGB lighting modes. Hands-free mic supports calls. Play audio with FM radio or USB support. Line-in function plays from other audio devices. Convenient handle for easy transport. Speaker size: 2 x 3". Rechargeable 3.7V 3000mAh battery. Frequency response: 100Hz-12kHz. Includes: USB charging cable. Aux cable. Shoulder strap.