Is HyperX Impact 16GB(2X8GB) 1866MHz DDR3L Compatible

I bought a used MacBook Pro early 2011 which supports 16GB RAM(8GBX2) Max. It currently has a 4GB(2X2GB) 1333Mhz DDR3L RAM. I have replaced the HDD with an SSD which has made it fast, I also wish to upgrade the RAM with HyperX Impact 8GB 1866MHz DDR3L CL11 1.35V SODIMM. Will it run or should I look for a 1333Mhz RAM, Its not for gaming and I don’t want to overclock it. I read few articles where it states that if you use a higher Mhz RAM with lower one it will run in the speed which the system supports. So I was thinking of doing the same another reason is in my country I was finding it hard to find a 16GB(8GBX2) DDR3L 1333Mhz RAM they are a little costly.