SonoAlti 3V Speaking Audible Altimeter

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The next generation SonoAlti 3V Speaking Audible Altimeter from Freefall Data Systems!

The altimeter that talks to you! Unlike its predecessor, SonoAlti 3V requires no external hardware to utilize the voice functions of this unique 2-in-1 audible altimeter.

SonoAlti 3V is the first skydiving altimeter to be set via WebUSB, which is a browser-based interface to USB devices. The online app enables precise control over all altimeter functions.

Made in an anodized aluminum case!

Key Features

  • Rugged anodized aluminum case (MIL-A-8625F Type II)
  • Set via WebUSB in a web browser (USB data cable included)
  • Built-in speaker with audio from a professional voice actress
  • 2.5 mm jack overrides built-in speaker for use of external speakers or earphones
  • Regular spoken altitude announcements in user-defined increments and ranges for each phase of the skydive
  • Unlimited additional spoken notifications (100 factory sounds, e.g. "breakoff")
  • Can also emit beeps and sirens like a standard audible
  • Simple firmware updates as easy as dragging files onto a USB drive
  • Share your settings with fellow skydivers
  • Add your own sound files
  • Three custom user presets selected via button press on the altimeter
  • Always on
  • Remembers your settings when the battery runs out
  • Adjusts automatically to local elevation
  • Freefall threshold can be customized for swoopers and wingsuiters
  • Landing zone offsets possible for those landing at a different altitude than takeoff
  • Tested to function accurately up to 30,000 feet
  • Rechargeable lithium polymer battery
  • Long battery life of approximately 100 jumps or two months
  • Low battery warning at 1,000 feet
  • Check battery status and other info by holding down both buttons

Technical Specifications

  • Dimensions: 55.0 × 34.1 × 11.9 mm (2.17 × 1.34 × 0.47 in)
  • Weight: 35.9 g (1.27 oz)
  • Anodizing type: MIL-A-8625F Type II
  • Battery: rechargeable lithium ion 3.7 V 250 mAh
  • Peak output volume: 90±3 dBA @ 10 cm
  • Audio format: mono 16-bit 44.1 kHz PCM
  • 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: 50 Hz
  • Charging temperature range: 0° to +50° C (32° to 122° F)
  • USB connector: Micro USB 2.0 Type B

Manual/Instructional Video ›

WebUSB App ›

List of Sounds with Examples ›


FDS Forum ›

Firmware ›

More Information
Price $379.00
Brand Freefall Data Systems
Color Black
Alarm Type Custom alarm - see product description, Freefall and canopy alarms
Battery Type Rechargeable
Data Log No logging feature
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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  1. Really solid package, competitive design/price, and available
    Just received mine. The original sonoalti seemed cheaply made, not rugged. This seems really solid, but haven't used it yet. They say the KISS helmet is no good for their audible, I say that is not true. My ear is nearly centered where it is supposed to be, and has worked well for other audibles. Mounting it in a KISS is easy if you remove the back cover of the "ear cap", then use the foam from the box in which it came to pad/secure it. I just use rubberbands secured over the screws (no clips needed) to hold the earcap in place. No tools needed, not as thick, and the unit is protected by the cover. On the KISS, better to adapt an audible to fit within the cover and be protected than exposed to see.

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