“This is a compact size submersible water pump (no auto-prime). It is built by a brushless motor ensuring smooth and silent operation than a brushless water pump. Characteristics: Brushless, permanent magnetic rotor, maintenance-free. Stator and circuit board sealed with epoxy resin. a USB interface, DC 5V input. Attached with static sealing, not dynamic, which avoids leakage problems. Small size, high efficiency, low consumption, low noise (less than 35 dB). A wide range of temperature resistance from 0 ° C to 100 ° C. Used in the aquarium, car cooling, humidifier, air conditioner, other cooling and circulation systems. Note: 1. It can be used in water or other liquids (without particles and impurities); NOT for acid and alkaline solution. 2. Do not dry burn the pump, otherwise it would be damaged; 3. PLEASE run the pump vibrate several times in the water to exhaust the air, it can work normally. Characteristics: The color black pump material: ABS Temperature resistance range: 0 ~