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Mercury Jade

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

ARES II

L&B wrist-worn digital visual altimeter; offered in several colour and graphic editions.

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).

CYPRES 2

Airtec’s automatic activation device, sold as Expert, Student, Tandem, Speed and changeable MODE versions (the latter switches between Expert, Student, Tandem and Speed), plus wingsuit settings. Activation altitudes are approximate AGL values; activation stops below about 130 ft (330 ft in Speed). Units made from 01/2017: voluntary maintenance at 5 and 10 years, 15.5-year service life; cutter life 16.5 years.