Warm Tips Please use a lubricant when you use the SLEEVE Package Included 1 × pen-is sleeve2 × vibrating ball1 × Remote control1 × USB cable Features 10 vibration frequencyremote control vibrationthickened and extendedstimulate & teaselocking ring to delay ejaculationskin-friendly and elasticreusable sleeveRechargeable vibrating ball Waterproof Sleeve The sleeve is 100% waterproof, but the vibrating balls are not waterproof, remove the vibrating ball when washing the sleeve. Simulated Veins The lifelike texture of the veins increases friction and pleasure during sex. High Elastic The sleeve is stretchy enough to fit over the pen-is. The lock ring can also be easily applied to the testicles.