Wave Maker · Totally submersible and oil-free motor to avoid pollution to the living circumstance ·9 models for your reference. · Wide spread just like an Wishy-Washy ocean wave, which is ideal for marine aquarium · 360 degree rotation to allow a full range of flow directions · Suction cups with magnetic base and articulating ball joints for versatile directions · Easy to install - just suck the cupula to anywhere of the inwall, plug in the power and it works · Extremely low energy consuming - just requires 12W power each maker · Power: 110V-120V / 60Hz 220V-240V/ 50Hz · Individual package more safety.