WHATS FOR? - The USB Rechageable training equipment is for body training. This Ultimate ABS Equipment can help to tone, tighten and strenghten your body, you can gain a better figure after consecutive use of this product for about 2 months. HOW TO USE? - To begin use simply apply the belt to your abs, then turn to desired intensity level. This equipment defaults to 20 minutes and automatically turns off the power after no operation.It's designed with power self-check function. Only when you stick the pads to your body, can the controller start working. Please read the instructions before use, tailored to fit the contours of your abdomen to stimulate your body FLEXIBLE & PORTABLE -This Abs belt charges with a USB port, fast charging and durable. Carry the "gym" with you to activate your sports cells anytime anywhere, no need to worry about not having time to exercise. Solve the troubles of fitness, so that exercise is no longer hard. HOW LONG SHOULD I USE