Quattro

Advanced 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 for traction in bigways);

-specifically designed for bigways, formations, freefly, wingsuit, AFF students, tandem jumps, and dome acrobatics and landing accuracy;

Dimensions: 56x41x12 mm.