661-5210 - Apple 4GB DDR3-1066MHz PC3-8500 non-ECC Unbuffered CL7 204-Pin SoDIMM Dual Rank Memory Module for MacBook Pro

Technical Specs:
- Capacity: 4GB
- Memory Type: DDR3 SDRAM
- Memory Speed: 1066 MHz
- CAS Latency: CL7
- Pins: 204-pin
- Rank: Dual Rank
- Error Correction Code (ECC): Non-ECC
- Buffered/Unbuffered: Unbuffered
- Voltage: 1.5V

Helpful Notes:
1. This memory module is compatible with MacBook Pro models released in mid-2010 and early 2011.
2. Upgrading your MacBook Pro's RAM can improve overall performance and allow for smoother multitasking.
3. Make sure to properly ground yourself and follow instructions when installing the memory module to prevent damage to your device.