Triglycerides and cholesterol are both fatty substances known as lipids. But, triglycerides are fats; cholesterol is not. Cholesterol is a waxy, odorless substance made by the liver that is an essential part of cell walls and nerves.
GSM (Global System for Mobile communication) is a digital mobile telephony system that is widely used in Europe and other parts of the world. GSM uses a variation of time division multiple access (TDMA) and is the most widely used of the three digital wireless telephony technologies (TDMA, GSM, and CDMA).
Most of countries are covered with 3G network and 2G network. GSM means 2G. If the alarm system are supporting GSM900/1800/1900 MHz, then they can work in your place, even there is 3G network. For example: USA with 3G network, but GSM alarm system can still work in USA.The reason is USA with 2G network under the GSM frequency of 1900MHz.SM alarm not only can make a voice phone call, but also can send short message (SMS). In addition, GSM alarm system is suitable for the mobile situation (car, boat...etc). New GSM wireless alarm system.