The wireless speakers are also IPX5 waterproof and 18 hours playtime(1200mAh battery) to meet your daily outdoor activities. Dual wireless pairing, connect 2 Bluetooth speakers together, you can play at the same time. The size of the bluetooth speaker only 2.9*2.9*3.5 inch, which is small and cute. It also has a lanyard design, you can take it anywhere. Customization is welcome.