Ukurikije uburyo bushya bwo gukwirakwiza urumuri rusanzwe rwigihugu, urumuri rushobora guhitamo guhuza cyangwa kudahuza ibikenewe byinshi;Hejuru-decibel ceramic buzzer hamwe na chip yabigenewe ikoreshwa mugusohora amajwi meza kandi ashimishije;Ibyuma bidafite ingese cyangwa plastike yatewe na pisitike ntishobora kubora imyaka 3.