CACAZI Wireless Doorbell Waterproof EU Plug 48 Chime 6 Volume (P750.00)
 
> The doorbell can use in office,home, hospital,factory,restaurant or any where you need it.
> 300 meter receiving distance (In the open area),Stable quality is ideal for villas, hotels, schools and other areas.
> The button cannot be placed on an iron door because it will interfere with the signal.
> Just plug the receiver into an electrical outlet,the push button transmitter can be stick it to the door with provided adhesive tapes.