The Crucial 16 GB DDR4 RAM kit is designed to boost your computer's capabilities and improve overall system performance. This kit includes two 8 GB SO - DIMM modules, operating at a speed of 2400 MHz (PC4 - 19200) with a CAS latency of CL17. It operates at a voltage of 1.2 V and is non - ECC and unbuffered, making it ideal for systems that require reliable and efficient memory. Specifically compatible with Apple iMac models featuring Retina 5K display (Mid 2017), this memory kit is an excellent choice for users looking to upgrade their systems for better multitasking and faster processing speeds.