This four-in-one penis trainer is a brand new upgrade from the previous model. This design not only has a vibration function. but also has 9 levels of pulse stimulation. which can train and stimulate your penis more effectively. In addition. it comes with two rings. which can make you stronger. harder and more durable while training. In addition. the newly designed APP JOYHUB control has a variety of gameplay options for you to choose. You can choose the one that suits you according to your own habits. Also having an interesting DIY mode. You'll explore more fun with it. All in all. this is a great penis trainer that can make you stronger. harder and longer-lasting with long-term use.