Apple 661-6503 | 4GB DDR3-1600MHz PC3-12800 non-ECC Unbuffered CL11 204-Pin SoDIMM Dual Rank Memory Module

Technical specs:
- Capacity: 4GB
- Memory Type: DDR3 SDRAM
- Memory Speed: 1600 MHz
- CAS Latency: CL11
- Pin Count: 204-pin
- Rank: Dual Rank
- Error Correction Code (ECC): Non-ECC
- Buffered/Unbuffered: Unbuffered

Helpful notes:
1. This memory module is compatible with select Apple MacBook Pro, iMac, and Mac Mini models.
2. Upgrading your computer's RAM can improve its overall performance and speed.
3. Make sure to check your computer's specifications before purchasing to ensure compatibility.