I recently bought a tail light modulator for my BMW 310 from Kisan Tech.
Andy assured me that the one he recommended was the correct one, however my mechanic could not install it and it turned out they sent the wrong one.
When I call then Andy said they would send the correct one but I had to pay for it and shipping.
My mechanic had a phone conversation with Andy and Andy said numerous negative things about BMW and the “screwey” way they do things. After that conversation we decided to return both modulators for a refund, assured by Andy.
Well they only refunded part of my purchase price, this is why I am warning you all about their shoddy service. Years ago I bought a Signal Minder from them, there were 2 ways you could install it and I plugged it in the wrong way (they have since changed the design so you can not install in backwards) Andy ripped into me when I called, so I ate the cost and purchased from another manufacturer.
Headlight and tail light modulators are great safety devices and I swear by them, but I will never purchase from or recommend Kisan.