SirenAlti
Dual-speaker audible altimeter
$379
SirenAlti represents a ground-up rethinking of the concept of a beeping audible. It integrates two speakers instead of one, and offers an extremely rich array of possible sounds and an extraordinarily high level of customizability.
Key features
Dual-speaker technology
- Enhanced audibility and perceivability—like two audibles in one pocket
- Three categories of sounds: simple, dual, and musical
- Static repeating alarms and dynamic ones that change according to altitude
Built to last
- Made in USA 🇺🇸
- Rugged anodized aluminum case
- IP67 waterproof
Sounds & presets
- Store up to five presets, selected by button press on the altimeter
- Unlimited alarms per preset—select from a rich library of 90 possible alarms
- Copy a preset for quick tweaks
Long battery life
- Rechargeable lithium-polymer battery (USB-C cable included)
- About three months, or roughly 80 jumps, of battery life
- Low-battery warning at 1,000 feet
- Always on
Customized to your skydive
- Customizable freefall threshold for swoopers and wingsuiters
- Adjustable volume for each preset and for each phase of the skydive
- Per-preset landing-zone offsets
- Adjusts automatically to local elevation
- Functions accurately from −5,900 to 30,000 feet MSL
Connected
- Logs your jumps for syncing to FDS Logbook
- Free Bluetooth® iOS/Android app for settings
- Firmware updates as easy as dropping a file on a USB drive
Technical specifications
Product numberFDS014
Dimensions42.0 × 35.0 × 12.6 mm (1.65 × 1.38 × 0.50 in)
Weight30.3 g (1.07 oz)
Anodizing typeMIL-A-8625F Type II
ColorsBlack, gold
Water ingress protectionIP67
BatteryRechargeable lithium ion 3.7V 165 mAh
Peak alarm output volume100 dBA @ 10 cm
Audio typeSynthesized tones
Operating temperature−40° to 65° C (−40° to 149° F)
Operating altitude−1,800 to 9,160 m MSL (−5,900 to 30,000 ft)
Relative altitude accuracy±0.75 m (2.5 ft)
Sample rate25 Hz
Charging temperature range0° to 50° C (32° to 122° F)
USB connectorUSB-C
RadioBluetooth Low Energy