Just a word of advice. They are a startup company with a small inventory. The SA3 tends to be sold out after a positive review. If Amir's measurements are good and you want it right away, you better put in an order quickly. Due to current problems in China, rising cost of air freight, IOTAVX likely uses sea/ocean freight transport from China to England to save cost, the next batch of equipment won't arrive for months.
I put in my order mid November and didn't receive it until end of January due to IOTAVX's part supplier problem and sea freight from China.
Their communication regarding the delays was terrible because the owner, Ian, deals with everything, and he was overwhelmed with orders and problems. Hopefully, it gets better now.