Rotating hose: Rotate 360 ° freely, easily adjust the optimal angle; Safe lighting: only serves to beautify the fish tank and not harm the fish or pollute the water; Brightness adjustment: The dim light can be adjusted through an external switch; Mini and compact, rotating hose, safe lighting, brightness adjustment, light bundle adjustment, easy installation; Beam adjustment: By pushing and retracting the product head forward and backward, the focus of can be changed; (In the backward state, shrinking the product head can enlarge . In the forward state, pushing the product head forward can shrink .)