The Ultimate Twin Arm Belt Set includes: 2 x Arm Belt The Arm Belt effectively trains your biceps and triceps. Our arm toner sends a 20Hz electrical signal into the biceps and triceps, causing them to contract and relax – an equivalent response to that generated by traditional weight training. Key Benefits: Easily train your biceps and triceps to tone your arms Features a built-in 23-minute training programme developed in close collaboration with one of the world’s top athletes 20 different power levels to customise your experience One full month of arm training in a single charge Track your progress and control your Arm Belts with the SIXPAD app