SonoAlti 4V
$389
Key Features
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Rugged anodized aluminum case
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Logs your jumps (altitude, speed, and temperature) for syncing to FDS Logbook
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Free Bluetooth® iOS/Android app for setting the altimeter and syncing logged data to FDS Logbook
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Firmware updates as easy as dragging a file onto a USB drive
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Store up to five presets and select them via button press on the altimeter
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Store unlimited alarms in each preset
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32 different alarm sounds
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Always on
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Remembers your settings and data when the battery runs out
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Adjusts automatically to local elevation
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Freefall threshold can be customized, and freefall alarms can be disabled below a certain altitude for swoopers and wingsuiters
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Speaker volume can be adjusted for each individual type of alarm (i.e. ascent, freefall, and canopy)
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Landing zone altitude adjustments can be made in each preset for those landing at a different altitude than takeoff
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Tested to function accurately up to 30,000 feet
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Easily fits in an audible altimeter pocket in your helmet
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Rechargeable lithium polymer battery (USB charging cable included)
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Long battery life (approximately 250 jumps or 2 months)
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Low battery warning alarm at 1,000 feet
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Check battery status by holding down both buttons
Technical Specifications
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Dimensions: 57.6 × 36.1 × 11.9 mm (2.27 × 1.42 × 0.47 in)
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Weight of control unit: 39.1 g (1.38 oz)
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Anodizing type: MIL-A-8625F Type II
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Battery: rechargeable lithium polymer 3.7V 320mAh
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Peak alarm output volume: 97 dBA @ 10 cm
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Operating temperature range: −40° to +65° C (−40° to 150° F)
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Operating altitude: −500 to 9,000 m MSL (−1,640 to 29,528 ft)
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Altitude resolution: 0.5 m (1.64 ft)
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Sample rate: 25 Hz
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Permissible charging temperature range: 0° to +50° C (32° to 122° F)
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USB connector: Micro USB 2.0 Type B
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Wireless technology: Bluetooth®
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Bluetooth wireless range: circa 2 m (6.56 ft)