The Neptune features:
Waterproof, not just water resistant.
User friendly menu system.
Automatically changes to ground, aircraft, freefall and canopy modes.
Display can be electronically flipped.
Electroluminescent backlight.
Selectable units: feet or meters.

Audible alarm details:
Four groups of personalized audible alarm settings.
Canopy alarms adjustable in 10' increments.
Freefall alarms adjustable in 100' increments.

Logbook details:
Detailed logbook to record your skydives electronically.
Logs CRW, wingsuit, hop & pop, and high altitude jumps.
Infrared interface for downloading log to Paralog client software.

Other features:
Automatic calibration for DZ altitude (manual override is available).
40,000+++ feet MSL altitude range.
Altitude is measured 16 times a second to ensure accuracy.
Training mode simulates normal freefall and descent rate for normal deployment, high speed and low speed malfunctions.
Uses 1 commonly available DL2450 battery.