Mini portable speakers Size: 2.99 * 2.99 * 3.54in Frequency range: 100Hz-18KHz Battery capacity: 1800mAh Powerful battery life up to 24 hours Small in size but large in capacity. Let your enjoy music without being uninterrupted from day to night.Meet your needs throughout the day. Playing at 40% volume when fully charged can bring you a 24-hour uninterrupted music journey.Up to ten hours of playback at maximum volume IPX7 waterproof and anti-Damage IPX7 protection safeguards against rain, dust, snow, and spills, you can enjoy music on the swimming pool, beach, bathroom and pool. It is also anti-shock and anti-damage. Even if the bluetooth speaker falls down at 1.5m high, it can still keep intact.