High Precision, Voltage Range 3.3~5.5V
Instruction: http://www.sunfounder.com/index.php?c=downloadscs&a=Manualdetails&id=64&name=Raspberry%20Pi
Compatible with Raspberry Pi and Arduino
It makes Raspberry Pi can still be punctual timing without network timing service
Solve the problem that Raspberry Pi can not time or goes back 1970 after reboot

Technical Details

Size (LWH): 6 inches, 4.5 inches, 0.1 inches
Product Details
Product Dimensions: 6 x 4.5 x 0.1 inches
Shipping Weight: 0.02 pounds (View shipping rates and policies)
ASIN : B00HF4NUSS