Kuphatikiza pa zida zamankhwala, opanga amathanso kulemba chizindikiro cha laser pa phukusi lamankhwala kapena mankhwalawo kuti adziwe komwe adachokera. Kudzera kupanga sikani kachidindo pa mankhwala kapena phukusi mankhwala, sitepe iliyonse ya mankhwala akhoza kufufuza, kuphatikizapo mankhwala kuchoka fakitale, zoyendera, yosungirako, kugawa ndi etc..