Commander xl electric pump has a 10 inch tube and is designed to accommodate larger penises. Easy to use, easy to clean and delivers powerful suction! Simply press and hold the grey button until the desired level of suction is reached. To release the suction, simply press the red quick release button. 3 velvety soft silicone sleeves in varying sizes accompany the pump to ensure a comfortable fit. To charge, plug in the charger to the back of the pump power source and connect usb to a wall outlethigh vacuum electric pump3 sleeve sizes for a snug fitextra large chamberwaterproofphthalates freerohs compliantmaterials silicone, as, abs, pvcpump length 13.38 inches, diameter 2.75 inches, circumference 8.75 inchesthree sleeve sizes internal diameter of opening, small 8211 1.125inches, medium 8211 1.375inches, large 8211 1.5inchesvoltage 8211 3.2vrechargeablecharging time up to 1 hr.use time 1 hr.