ʻO ka hāʻawi ʻana i ke kukui kīʻaha, koho manuahi o nā reflectors e hoʻokūkū a ʻaʻole e hoʻokō i nā ʻano koi like ʻole;Hoʻohana ʻia ka chip buzzer ceramic decibel kiʻekiʻe a me ka chip kaʻa kaʻa kūikawā e hana i kahi hoʻopuka paʻa a me ka maikaʻi leo maikaʻi;ʻO ke kila kila a i ʻole ka pale palaki, ʻaʻole ia e ʻōpala a hiki i 3 mau makahiki.