Recommend avoiding the shop
Recommend avoiding the shop. Products sold are old stock, selected and paid for delivery options are not respected and customer service is rude.
Bought 9 smoke detectors with RF modules, including integrated 10 year batteries. The components were sold as a package. The smoke detectors were just fine. But the radio module batteries had just 8 years left in them before the manufacturer marked best before end (BBE) date. The smoke detector and the radio module form an integrated unit and were sold as such. In connected environment the pieces are useless as stand-alone. This means that the whole package was sold with 10 year battery promise, but it is usable just for 8 years before requiring full replacement. As a result 20% of the price was paid for nothing, and replacement effort is required sooner than expected.
Refund request was only partly accepted, i.e. refund for missing life-time for radio modules, but no refund for the smoke detectors nor shorter than expected replacement cycle. This is similar to selling a car, and refunding just the cost of missing engine as the factory forgot to install it.
As icing on a cake, the company offered DHL (more expensive) and UPS (cheaper) delivery options. Paid for DHL but got slower delivery via UPS.