Wireless Siren model number
I just purchased a SimpliSafe alarm system. I would like to add an exterior siren, but $60 seems steep for an add-on. The current model is listed as AUS301. I see new units listed on eBay that look the same as the current unit, but have a different model number WS3 or
WS 3000? Will they work with my new system, or are these an earlier version?
thank you in advance for your help and information!