Catalog > Consumer Electronics > Security & Alarms > Alarms > Alarm Systems GSM Program Module GSM Program Module GSM Program Module Part No: MEGSM-PM 183.54 ZAR inc for 1 Each (Quoting) Add to Cart Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE Specifications RX connected to RX TX connected to TX 3V connected to 3V CLK connected to CLK NOTE : Tighten the screws on the terminals to ensure a good electrical connection. Additional Information Brand Sentry