This PecBuilder EMS Chest Trainer for Men will stimulate your body skin with low frequency to tighten and strengthen your muscles, giving you a satisfying body figure. EMS (Electrical Muscle Stimulation) sends signals directly to the muscles through the current stimulation and supports muscle movement. All you have to do is fit the abdominal toner into your body and let it work your muscles. MenUps EMS Chest Trainer for muscle training and body slimming. This muscle trainer can help you tighten and strengthen your muscles, you can gain better body shape after using tummy toner for about 2 months in a row. OUR GUARANTEE We are confident that we offer some of the best products on the market. Therefore, we provide a 30-day guarantee. We will make every effort to ensure that you are completely satisfied with your purchase. Online shopping can seem daunting. We want you to know that there is absolutely zero risk of purchasing something. We won't make it difficult if you don't love it. We offer email and ticket support 24 hours a day, 7 days a week. If you require assistance, please contact us. Please contact customer service if you have any problems with your purchase.