What's the function of multifunctional crutches? What do you recommend?

Different from ordinary crutches, intelligent crutches can not only help people walk safely, but also have some functions of scientific and technological intelligence. Let's take Ye Mei's smart crutches as an example. Function 1: GPS positioning function, which is one of the most important functions of intelligent crutches. The function of this function is mainly to prevent users from getting lost and locate quickly. As far as I know, if there is this GPS positioning function, there will also be an electronic fence alarm function, which is to set an activity range and call the police if the user leaves this range. Then at the time of purchase, you can see if this positioning is accurate. Function 2: Intelligent incoming call alarm. This alarm is SOS's help function. You can set several sets of emergency numbers on crutches. When there is an emergency such as getting lost or falling, users can ask their loved ones for help through the SOS key. Function 3: Lighting function. This function is also standard on non-intelligent crutches (that is, multifunctional crutches on the market). High brightness, low power consumption, adjustable. Whether the light bulb is broken can be replaced (this is very important) is the criterion.