英国采购需求：视频对讲系统、WIFI视频门铃、音频对讲、无线门铃、智能安全摄像头、智能婴儿监视器

I'm looking for a replacement bell push unit for my doorbell, as I'm having issues with the current button not functioning properly. It's crucial that the new unit is compatible with my existing setup to ensure everything works smoothly. Could you please provide me with a quote for this replacement unit? I'm located in the UK, so if you could also indicate shipping times and options, that would be really helpful. Thanks!