LED power indicator to indicate power-on state Control circuit, the pump is more stable Tap out the instructions marked Big 4P+Small 3P power connector can be directly plugged into the headboard fan old position Support speed testing function With rubber base, ultra-quiet experience. Tips:It is good to use the pipe with 8MM inner diameter Specification: Model: -300 Thread size: G1/4 (2 points) Flow: max300L / h Head: max1.9 meters Power Connector: Big 4P Connector+ Small 3P connector Voltage: DC12V Power: 5W Water for tank capacity: 150ml Noise: 25DB Line length: 60cm Dimensions: Length 76mm x wide 56mm x height 80mm (net size, excluding out of faucets, ) Color:Black Material:PC+ABS+Copper Package Contents: 1 * Water Cooling Pump Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.