Leten X9 Piston Male Masturbator Review Bottom Line The Leten X9 Piston Masturbator is a great way to get into male masturbators without a big initial investment the some male masturbators require. While it doesn't come with some of the features that the more high end masturbators come with the Leten X9 Piston does come with multi-speed settings, replaceable sleeves and the ability to use replaceable and even rechargeable batteries.The sleeve isn't designed to suit the needs for everyone but in our review we found it to perform better then expected. Breaking It Down Performance When topped up with 4 lithium AA batteries the Leten X9 hums along at a great speed. With two speeds to allow for different stroking actions any beginner can find the right speed for their use. Leten uses a very powerful high torque DC motor to control the piston rods which allow for every stroke to feel its best. We are still in the process of figuring out just how long the batteries wil...