Good price for a 240V photoelectric smoke alarm - $45 at Bunnings. Also battery only photoelectric for $14 and battery only ionizing for $8.60.
I'm taking advantage of the price to upgrade 2 old 240V alarms from ionizing to photoelectric, add a battery photo-electric in the roof space & add a battery ionizing elsewhere in the house (photo-electric is recommended but ionizing is better at detecting some types of fires).
Note 240V smoke alarms need to be installed by an electrician.
Do you need a qualified electrician to install these 240V?