Feature Powerful function, safe and reliable, stable performance, large displacement. DC or USB interface, compact, portable, can be used for outdoor fishing. Quiet, low power consumption and low noise (less than 37db), for living room, bedroom, office, etc. For aquariums, car coolers, humidifiers, air conditioners, and other cooling and circulation systems. 4 modes adjustable with memory flow pumping head function. Description: Item type: Brushless Pump Maximum head :3 m (QR50L), 4 m (QR50H) Flow head adjustment function :4 regulation band memory Impeller structure: semi-open impeller Working voltage :DC12V, USB 5V Suction diameter :8mm Noise: 37 db Power cord length :150CM Overall dimensions :54(L)x37(W)x42(H)mm Discharge diameter :8.5mm Impeller suction: single suction Product weight :100g Service life :20000 hours Waterproof performance :100% IP68 for diving Heat resistance: 0-60 Maximum flow :300L/H, 400L/H Load power: 4.8w QR50L, 10W QR50H Product material :PC+ABS Package includes: 1 * Brushless Pump Notes: The colors deviation might differ due to different monitor settings.