●Four Independent Switches: This CE & FC certificated cup turner is equipped with four independent switches, so you can switch on/off any holder as you need. Besides, it can rotate clockwise or counterclockwise to satisfy left-handed needs with a speed range from 5 rpm to 8 rpm. ●Adjustable Holders: This tumbler turner contains four silicone holders that are easier to clean and are more durable than foam, firmly griping your tumblers from slipping and tilting. It is suitable for a variety of cups with 1.25in to 3.74in diameter. ●Quiet Motor: The 16W synchronous motor features noise reduction and efficient operation. It does not produce a harsh rubbing sound and can be used safely and quietly, even at night. Moreover, this multi-cup turner will not generate heat after 24 hours of constant use. ●Solid Construction: The shell and bracket of this multiple-cup turner are made of premium aluminum alloy, effectively maintaining the surface brightness and service life. Four silicone suckers on the bottom can remain a smooth operation and prevent the device from tilting or collapsing. ●Easy to Assemble: According to the detailed manual instruction, users only need to spend 2-5 minutes to complete the installation. In addition, there is enough distance between the bottom and the holders so that users can easily replace or adjust the arms.