Back of doorbell with hardwired connectors enclosed in box.
Got this from a previous deal on here and yesterday charged it for the first time after getting 106 days out of the first charge.
If possible wire a Transformer to it
Battery lasted less than 2 weeks on mine before needing a charge! Set the zone to only cover my drive way too.....
Really impressed with mine, bought from an offer on here a few months ago. Easy to set up and only just needed recharging.