Quattro Airtec is the inventor of

Airtec is the inventor of parachute safety devices

and packing while remaining your ultimate “everyday canopy

-3 signals in a plane

there is no need to buy two helmets

Quattro Airtec is the inventor ofAdvanced audible altimeter with extremely accurate altitude determination. It's so accurate that Larsen & Brusgaard have added additional signals that can be used to indicate your landings. But they still recommend relying primarily on your eyesight and experience. 4 signals for freefall; 3 signals under the canopy; 3 signals in a plane; Track guide between the first and second freefall signals, there will be pulsing signals every 0. 5 sec. (useful