1.The personal alarm sound level will arrive 110db 2.this alarm shape is toy,it can hang on bag,mobile,keys ITME NO. SPWCIFICATIONS: size(mm)&weight(g)inner packing(cm) OUTER PACKING (CM) PACKING DETAILS QL-PA-332 79(L)*36(W)*23(H) This alarm have a receiver and a transmitter . the receiver left transmitter ,it can ring.the alarm effective distance have 25m.