A multifunctional sounding and lighting device includes: a housing unit with an upper case and a lower case which are detachably combined to facilitate the operations of the device; a printed circuit board having sound and light circuits disposed therein fixed on the lower case; a buzzer provided in...http://www.google.com.tw/patents/US4992912?utm_source=gb-gplus-share專利 US4992912 - Multifunctional sounding and lighting device
