Vesternet  started having their Vesternet Mondays  promotion since 27th June 2016. During Vesternet Mondays, you will get up to 20% discount for Vera, Fibaro, Aeon, Qubino, Foscam, and Popp Products. Every monday there are different products on sale.
On 11th July 2016, I bought the Aeon Labs Aeotec Z-Wave Siren  for £29.02 (S$51) down from £35.83 (S$65).
Shipping to Singapore is a flat fee of £11.41 (S$21) for economy (10 – 20 days) or £11.89 (S$22) for standard (6 – 12 days). I always go for standard.
I am not too sure what to do with the siren yet, probably will get it to sound when there is smoke detected in the kitchen or water leak underneath the sink.
The siren has a built-in rechargeable battery that keeps it powered even if your main electrical power is out. It has five different alert tones with three level of sounds (88db, 100db and 105db) and three LED lights for visual alarms.
I am pretty amazed at how small the siren is. It is much smaller than what I imagined it would be! Despite being small in size, the sound is really loud for an indoor siren. I wish there is an option even lower than 88db, because at 88db, the siren is still loud!
The only downside is that it is available in Schuko (EU) socket only and hence you will need an adapter to use it in Singapore.
If you buy the siren from Vesternet, they do provide a free UK Adapter to go along with it.