All electronics ship with US style plugs.You may need a voltage converter or a plug adapter.
Special Features
ANTI REVERSE FLOW: Prevents water from flowing backward through the tubing when the air pump stops working, avoiding damage to the pump body.
LIGHTWEIGHT & PORTABLE: The backstop valve weighs only 3g to avoid affecting the hose, 5.3cm/2in long, 1.4cm/0.55in wide, comes with a clear plastic case for easy storage.
LONG LIFE: The aquarium check valve is made of ABS plastic, sturdy and can be used for a long time, highly transparent, easy to observe the blockage and easy to clean.
EASY TO INSTALL: blowing air to judge the direction. The end that can be blown in connects to the hose at the air pump end, and the end that cannot be blown in connects to the hose at the bubblestone end.
APPLICATION: Only for most regular aquarium air pumps with 3/16" diameter hose, not for special gases or other high pressure systems.