mpact and portable usb water pump: dc3.5v-9v charging, ideal for crafts and diy projects miniature submersible pump: treasure your creativity with this versatile, waterproof pump versatile dc pump: 3.5v-9v power range, suitable for various applications, from hobby to industrial use easy to use: simply plug and play, no external power source required durable and reliable: high-quality construction ensures long-lasting performance and durability