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    SIM900A GSM GPRS wireless transmission module for dual-band communication, SMS, and IoT applications.
    SIM900A GSM GPRS Wireless Transmission Module
    1 X  3,500 =  3,500
    0.91-inch OLED display module with I²C interface.
    0.91 Inch 128x32 OLED Display Module
    1 X  450 =  450
    L293D motor driver module for controlling DC and stepper motors
    L293D 4-Channel Motor Driver Module
    1 X  400 =  400
    2WD Aluminum Alloy Smart Robotic Car Chassis
    2WD Aluminum Alloy Smart Robotic Car Chassis
    1 X  2,500 =  2,500