* It operates for 24 months and more without replacing a battery or sensor
* It is extremely small lightweight and is low priced
* The small size and light weight make the SP2nd ideal for personal use
* SP2nd automatically makes vibration as well as visual and audible alarms
* high-quality microprocessor is installed and contains automatic zero-calibration function 
* Easy span-calibration function
* The loud audible alarm, vibration alarm and high-brightness Backlight are easily recognized