8GB DDR4 2666Mhz 1.2V 260 Pin Crucial Laptop Memory SODIMMS

The Crucial 8GB DDR4 SODIMM memory module you've mentioned has the following specifications:
 
Capacity: 8GB
Type: DDR4
Speed: 2666MHz
Voltage: 1.2V
Form Factor: SODIMM (Small Outline Dual Inline Memory Module)
Pin Count: 260 pins
CAS Latency: CL19
 
This memory module is designed specifically for laptops or other mobile devices that require DDR4 memory running at 2666MHz. The low voltage (1.2V) is common for DDR4 modules and helps in reducing power consumption, which can be beneficial for laptops to improve battery life. Make sure to verify compatibility with your laptop's specifications before purchasing.