*these products are suitable for home,hotel,hospital etc. *sound category: single dingdong,double dingdong, west minister, 12
melodies, and others *low power consumption *sender: DC9V(6F22)/DC12V23A *receiver: DC3V(1.5V AA*2) *frequency: 433.92MHz remote control distance:at least 30m *one sender can control one or more receivers *supply 531441 digital codes *one sender can control one or more receivers *provide every countries designhard paper carton or plastic carton
(which can be changed according to your requirement