@Lucy88 Hi, If the two places are under the same electric meter, the TL-WPA7510Kit would be suitable. As for the AC1750, Did you mean RE450? For the 7510, the adapters and extender are communicating...

@tpwhyguy Hi， Thank you very much for your patience. If possible, the same model would be more recommended or you could consider our Deco mesh devices, like Deco M4, E4, or P9, or the powerline...

@PS4 Hi, sorry for the delay. Thank you very much for your time and patience. Since RE305 did not support firmware recovery, I am afraid that you might need to contact the shop retailer or local...

@Elsayed129 Hi, sorry for the delay. Since you have UK version, the latest firmware is RE205(UK)_V3_201030 https://static.tp-link.com/2020/202011/20201120/RE205_V3_201030.zip but if you have EU...

@Johnno5867 Hi, If the 2nd house light(powerline light) still lit up when they are plugged into the garden outbuilding, they are still under the same circuit. You could try to change the IP address...

@Fjj88 Hi, sorry for the delay. I am afraid neither of them is onemesh compatible. https://www.tp-link.com/onemesh/product-list/ thank you very much and wait for your reply.