The premium penis pump is very easy to use, designed for beginning users. The easy-to-use ump handle can be used with just one hand. The soft jelly sealing sleeve is in realistic mouth shape and give more comfort and long erection. You may observe the growth of your penis through the calibrated cylinder each time you pump it. The pump comes with a flexible host with a pressure release valve. The pressure in cylinder can be dispersed as soon as the release valve is pressed.