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Solo II

L&B entry-level audible altimeter.

Mercury Crimson

Alti-2 Mercury audible altimeter (out of stock at the time of checking).

Mercury Jade

Alti-2 Mercury audible altimeter (out of stock at the time of checking).

Optima 3

Bluetooth audible altimeter for in- or outside the helmet: three climb, three freefall and three canopy warnings (up to 9,900 ft), canopy guide tones, four memory banks, altitude offset; logs the last 50 jumps (via the JumpTrack app). 56 × 41 × 11 mm.

Optima II

Audible altimeter with three selectable warning altitudes (two pulsating tones and a siren), a swoop warning bank, built-in clock and four memory banks; mounts inside or outside any helmet. Also sold with an LED socket ($373).

Protrack 3

L&B Protrack audible altimeter, third generation.

Protrack II

L&B Protrack audible altimeter, second generation.

Quattro 3

L&B Quattro audible altimeter, third generation.

Quattro

L&B Quattro audible altimeter; also sold with an LED socket ($373).