Specification:1.Wireless - Easy to Use / Wear anywhere2.there are 2 belt which are stretchy. 3.The short is 25cm. The long is 50cm. 4.They can be connected together to use.5.6 'Smart' Programmed Routines with 10 variables levels of intensity for a complete and personalised workout6.Tiny Gentle Electronic Pulses are delivered to your muscles7.Tones your Tummy， Waist， Legs， Arms and Bum 8.Keep in Trim without the GymPacking Content:2 Adjustable Waist and Leg StrapsBattery Included (plus a spare)Full Instruction Manual Workout Guide