During the winter, the elderly often feel poor blood circulation to the hands, so the following devices specifically designed to solve the elderly hands numbness problems. First?? Convenient: Direct plus external low-frequency circulator, which is very convenient. Second?? Fast: easy to disassemble & assemble, just need one minute. Third?? The low price: After mass production, the price will be very cheap. Fourth?? Security: light weight, small size, very safe. Fifth?? Market: hospital can be placed on the table or at home use it, great marketing. Construction A: palm shape design, the elderly will see it clearly. B: Join the principle of low-frequency electrical stimulation, can promote blood circulation. C: large-scale will be designed in the future, promote foot blood circulation as well.