Akukho mfuneko yokutsala izandla, vula ngokukhawuleza. I-BP4700 ixhotyiswe ngondoqo ophuculweyo we-rebound echanekileyo, kwaye i-trigger structure elungiselelwe ngamawaka eemvavanyo inokubamba ngokuchanekileyo iintshukumo ezicinezelayo ezifihlakeleyo, ukukhulula ngoko nangoko amandla afanelekileyo okubuyela kwakhona, kwaye utyhale umzimba wocango ukuba uvuleke kakuhle. Kulula ukuba abantu abadala kunye nabantwana basebenze, kwaye ugwema ukuhlukana kwendawo yonke ngokubamba, ukwenzela ukuba umphezulu wefenitshala ube nesitayela esipheleleyo nesilula sokuyila.