Transcend 4GB DDR3L SO-DIMM 1600 MHz CL11 1Rx8 DDR3-1600 Unbuffered SO-DIMM 4GBLow Voltage Unbuffered long DIMMs and small outline DIMMs with a lower operating voltage (1.35V) for greater energy efficiency compared with standard DDR3 modules that operate at 1.5V. Specifications: DRAM Module RAM Type DDR3 DIMM Type Unbuffered SO-DIMM Speed 1600 CAS Latency CL11 Capacity 4GB Rank x Org. 1Rx8 Component Composition (512Mx8)x8 Voltage 1.35V Pin Count 204 pin PCB Height 1.18 inches Operating Environment Operating Temperature Standard0°C (32°F) ~ 85°C (185°F)