Sundried Thai beef

I'm in Hua Hin Thailand. My landlady had this meat outside today. She told me it's a piquant cut. The other looks like stir fry or for braising. She lets it dry outside for 4 hours. Each steak gets sealed. She ships out to customers via a courier. Each steak is 159 baht or about $4.85 ea. She gave my a steak to sample.