Shenzhen Shanhai Technology Ltd.
Shenzhen Shanhai Technology Ltd. Professional GSM GPRS modem and module GPS module manufacture. We supply high quality products, competitive price, and 5 star customer service
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edge wireless modem
850/900/1800/1900/2100mhz
Power adapter, RS232 Cable, GSM antenna, adapter cable , headset
Including : Power adapter, RS232 Cable, GSM antenna, adapter cable , headset, GPS antenna and document.
From the picture you can see ;
a. Simcom 900B module interface
b. Sim card interface
c. Handset interface
d. Download switch, turn on or off download function
e. VBAT switch , switch the voltage source from the adaptor or external battery
f. PWRKEY key, turn on or turn off SIM900B
g. Buzzer
h. Expand port, such as keypad port, main and debug serial port, display port
i. Main serial port for downloading. AT command transmitting, data exchanging
j. DEBUG serial port
k. Hole for fixing the antenna
l. Source adapter interface
m. Light
n. Hole for fixing the SIM900B
o. Hand phones interface