Module type: SIM800L
Working voltage: 3.7~4.2V
TTL serial port, can be directly linked with single chip microcomputer. Don*t need MAX232
Automatic startup power module, automatic network Onboard signal lights all the way.
It flashes slowly when there is a signal, it flashes quickly when no signal.

Technical Details

Size (LWH): 4.6 inches, 3.1 inches, 0.6 inches
Product Details
Product Dimensions: 4.6 x 3.1 x 0.6 inches
Shipping Weight: 0.02 pounds (View shipping rates and policies)
ASIN : B00X3HCSU2