Speed Buzzer is a GPS speedometer with speeding alarm. Driving at high speed is very dangerous. High speed vehicle need long braking distance. Any mess from other drivers could cause fatal accident. It is very important to maintain distance and keep maximum vehicle speed at speed limit. Speed Buzzer has 2 tiers of speed limit. It constantly remind you if you pass city speed limit. Buzzer will sound if you exceed intercity speed limit. Safety first.