Feature:<br /><br />\u25cfWith streamline design， it is beautiful and decent. Made from ABS plastic， the shell of the body is firm， durable and endures to shock. And the air-intake room is made from macromolecule complex rubber， and has long service lifetime.<br />\u25cfIt is driven by the top-quality motor. The input power can be adjusted with the phase-angle of controllable silicon. With the adjustable exhaust， this device is advanced， reasonable， high-efficiency and energy-saving.<br />\u25cfAll the movable parts are sealed inside the body. Adopting labyrinth-type air-ways and rubber anti-shock cushion， the operation is stable without any noise.<br />\u25cfThe article is produced according to standard and meets concerned national safely stipulations. It is safe and reliable.<br /><br />Product Attributes: <br /><br />Model:S500<br /><br /><br /> <br />  <br />   <br />    Model<br />   <br />    S-500<br />   <br />    S-1000<br />   <br />    S-2000<br />  <br />  <br />   <br />    Voltage<br />   <br />    AC230\/115V<br />  <br />  <br />   <br />    Frequency<br />   <br />    50\/60Hz<br />  <br />  <br />   <br />    Power<br />   <br />    2.8W<br />   <br />    3W<br />   <br />    3W<br />  <br />  <br />   <br />    Output<br />   <br />    4.0L\/min<br />   <br />    4.2L\/min<br />   <br />    2x4.0L\/min<br />  <br />  <br />   <br />    Pressure<br />   <br />    0.010Mpa<br />   <br />    0.014Mpa<br />   <br />    0.012MPa<br />  <br />  <br />   <br />    Size(LxWxH)<br />   <br />    116x70x56mm<br />    (4.57x2.76x2.20&amp;quot;)<br />   <br />    138x80x59mm<br />    (5.43x3.15x2.32&amp;quot;)<br />   <br />    163x105x88mm<br />    (6.42x4.13x3.46&amp;quot;)<br />  <br /> <br /><br /><br />Package Include:<br /><br />1 x BOYU S-500 Aquarium Air Pump<br /> <br />Note:<br /><br />1.Due to the light and screen difference， the item's color may be slightly different from the pictures. Please understand. Make sure you don't mind before you bid.<br />2.Size just for reference. Please allow few differences due to manual measurement.<br />3.This serial article is a kind of low-press &amp;amp; non-oil pump， and the exhaust air is clean. It is suitable for adding oxygen into various aquariums， seafood pools， storage of marine lives seedlings as well as indoor and outdoor decoration of water-column lamps.