THE FLEX MINI Accessory Pack - Bottom Muscle Toner (requires THE FLEX BELT Controller-Sold Seperately) 100% Polyester Imported Firm and tone your bottom. High performance EMS muscle toning system The FLEX MINI is for use with your existing FLEX BELT Controller (sold separately) Convenient and easy-to-use with custom programs for beginners to fitness enthusiasts FDA cleared to tone, firm & strengthen muscles - this clinically demonstrated technology can help you achieve firmed and toned bottom muscles in just 8 weeks when used 5 times per week Refer to page number 11 in the manual below for troubleshooting instructions.