The speaker has IPX4 waterproof capability. Lighter ABS material makes the weight of the speaker smaller. The built-in 1200mAh battery allows the speaker to work continuously throughout the day. The speakers are available in 3 colors. The speaker can use Bluetooth, memory card, U disk and data cable to play music. The built-in microphone can use the speaker as a portable microphone. The speaker can be customized with logo to meet customer marketing needs.