Zycoo Mod GSM 4 Port

Specifications GSM Modules:

Each port has one LED (Light-Emitting Diodes), which is assembled on the mainboard.

The Red LED indicates port status:
Solid Red = Module loading successful
Blink Red = Channel Ringing
If the LED is off, the GSM module is loading failure.

The Red LED indicates port status:
Solid Red = TE Model

The Green LED indicates port status:
Solid Green = NT Model
If the LED is off, the module is loading failure.

SIM900 Key Features

Based on SIM900 chipset, a quad-band GSM engine, working on GSM 850MHz, EGSM 900MHz, DCS 1800MHz and PCS 1900MHz frequencies, the module can be used worldwide.