Description

The next generation SonoAlti 4V Speaking Audible Altimeter from Freefall Data Systems!

The altimeter that talks to you!

The SonoAlti 4V keeps all the features of the 3V plus is smaller, has a longer battery life and uses a USB C connection. It requires no external hardware to utilize the voice functions of this 2-in-1 audible altimeter.

• Built-in speaker with audio from a professional voice actress
• User presets set via WebUSB in a web browser\
• Regular spoken altitude announcements in user-defined increments and ranges
• Unlimited additional spoken notifications and altitude read-offs
• Add your own notifications or sounds
• USB C connection
• Always on
• Rechargeable lithium ion battery
• Freefall Data Systems’s most compact audible
• SonoAlti 4V 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 Cdata cable included)
• Built-in speaker with audio from a professional voice actress
• 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: 53.1 × 33.4 × 10.6 mm (2.09 × 1.31 × 0.42 in)
• Weight: 32.5 g (1.15 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: USB C

Manual/Instructional Video ›

List of Sounds with Examples ›

FAQ ›

FDS Forum ›

Firmware ›

WebUSB App

Additional information