Our old doorbell ran wirelessly on batteries - two "c" size - but it seemed to flatten batteries in a short time - even if it was not used. [most of our friends just give a holler and walk in!]
Figured we could afford a new one. Sales guy said "We're getting no complaints about these! [Digitech model LA5056]
Specification sheet states USB DC 5v 0.5 [required, not included]
I am unsure as to whether the usb plug has to be 'live' or not - the instructions are very short and basic. Plus I have yet to discover where a battery could be inserted!
The instruction sheet tells how to change the ringtones, but little else.
So a few questions :-
Are you NAT'ers familiar with these doorbells?
How on earth do you access the battery compartment?
Does the remote control need powering - or does it 'piggyback' electronically from the base unit?

These questions from a bloke in Australia - hoping that they are 'multinational'!
The photo shows the longer than wide remote control, alongside the receiver.

(wireless doorbell (full).jpg)

wireless doorbell (full).jpg (65KB - 9 downloads)