SonoAlti G2 Audible Altimeter

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The new SonoAlti G2 Audible Altimeter from Freefall Data Systems!

Now made in an anodized aluminum case and features the FDS Logbook!

SonoAlti G2 is the latest version of this unique audible altimeter that interfaces with an app via Bluetooth® wireless technology. This powerful interface provides the user with an unprecedented level of control over all aspects of the audible altimeter's functions.

SonoAlti makes setting your audible altimeter easier than ever! Just download the free FDS Altis app from Google Play or Apple's App Store, and configure all your setting right on your phone.

This newest version includes a one-year subscription to FDS Logbook! After the 1st year, the FDS Logbook app is currently $20 per year.

Key Features

  • Rugged anodized aluminum case
  • Logs your jumps (altitude, speed, and temperature) for syncing to FDS Logbook
  • Free Bluetooth® iOS/Android app for setting the altimeter and syncing logged data to FDS Logbook
  • Firmware updates as easy as dragging a file onto a USB drive
  • Store up to five presets and select them via button press on the altimeter
  • Store unlimited alarms in each preset
  • 32 different alarm sounds
  • Always on
  • Remembers your settings and data when the battery runs out
  • Adjusts automatically to local elevation
  • Freefall threshold can be customized, and freefall alarms can be disabled below a certain altitude for swoopers and wingsuiters
  • Speaker volume can be adjusted for each individual type of alarm (i.e. ascent, freefall, and canopy)
  • Landing zone altitude adjustments can be made in each preset for those landing at a different altitude than takeoff
  • Tested to function accurately up to 30,000 feet
  • Control unit easily fits in an audible altimeter pocket in your helmet
  • Rechargeable lithium polymer battery (USB charging cable included)
  • Long battery life (approximately 250 jumps or 2 months)
  • Low battery warning alarm at 1,000 feet
  • Check battery status by holding down both buttons
  • Fits standard KISS helmet side plates when plate is installed inverted.

Technical Specifications

  • Dimensions: 57.6 × 36.1 × 11.9 mm (2.27 × 1.42 × 0.47 in)
  • Weight of control unit: 39.5 g (1.39 oz)
  • Anodizing Type: MIL-A-8625F Type II
  • Battery: rechargeable lithium polymer 3.7V 320mAh
  • Peak alarm output volume: 97 dBA @ 10 cm
  • Operating temperature range: −40° to +65° C (−40° to 150° F)
  • Operating altitude: −500 to 9,000 m MSL (−1,640 to 29,528 ft)
  • Altitude resolution: 0.5 m (1.64 ft)
  • Sample rate: 25 Hz
  • Permissible charging temperature range: 0° to +50° C (32° to 122° F)
  • USB connector: Micro USB 2.0 Type B
  • Wireless technology: Bluetooth®
  • Bluetooth wireless range: circa 2 m (6.56 ft)

Manual/Instructional Video ›

List of Sounds with Examples ›


FDS Forum ›

Free iOS App on Apple App Store ›

Free Android App on Google Play ›

Firmware ›

More Information
Price $309.00
Brand Freefall Data Systems
Color Black
Alarm Type Custom alarm - see product description, Freefall and canopy alarms
Battery Type Rechargeable
Data Log Logs your jumps (altitude, speed, and temperature) for syncing to FDS Logbook. Free Bluetooth® iOS/Android app for setting the altimeter and syncing logged data to FDS Logbook.
Downloadable Info Yes
Feet or Meters Settings for Feet and Meters
Function Altimeter only
Visual Port No
Size 57.6 × 36.1 × 11.9 mm (2.27 × 1.42 × 0.47 in)
Price View Price Range
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Customer Reviews
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  1. Great durable altimeter with useful features!
    I jumped with this altimeter only 3 times, but fall in love with it!
    Sounds good in a plane, free-fall, and under canopy.
    Accidentally bought two subscriptions. Wrote email to support and they cancelled both payments and sent me a video on how to enable free subscription (super friendly and fast responses from support). Also I believe that it supported by the guy who created YouTube manuals for the Alti devices (Casey).
    The most what I like in this devise - it's not need to turn it on/off. Just put it into the helmet, charge once in two month and enjoy!

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