Door Bell by Omega . Twin Cordless with both a mains and battery chimes.

It consists of a single push with TWO receivers. These can be located up to 75 metres from the bell push. ONE  bell is battery operated and one plugs into a spare 3 pin socket. They are very loud at 75 decibels.

 You are supplied with a fitted 3v lithium battery for the push . We also supply this with a SPARE maxel lithium battery and the  2 x aa pencil batteries needed for the battery reciever, The other is powered by the mains.

. It has a simple Ding Dong, but you can select any of 8 melodies if you do fancy a change. It is ideal for the hearing impaired as it has 2 flashing LEDs on each unit that illuminate when the bell is pushed.

A great doorbell for a larger house when one reciever may not be enough.