AON2 X0 Digital Skydiving Altimeter

AON2 X0 is a compact, no-nonsense digital skydiving altimeter for jumpers who want a clear visual altitude reference without menus, Bluetooth, logging or unnecessary complexity. It keeps the useful parts simple: an always-on sunlight-readable display, feet/metres selection, automatic calibration, altitude offset and USB-C charging.

Digital simplicity for altitude awareness

The X0 is built around one job: showing your altitude clearly. Compared with an analogue needle altimeter, the digital display is especially easy to read at low altitudes, where small needle movement can be harder to interpret quickly. The 1.28 inch high-contrast LCD stays on, is designed for sunlight readability and uses large clear numerals rather than a basic seven-segment style display.

Who it is for

• Skydivers who want a simple visual altimeter with minimal setup.
• Students and licensed jumpers who prefer a straightforward altitude display.
• Jumpers looking for a compact backup visual altimeter.
• Anyone who wants feet/metres switching without changing an analogue altimeter face.

Key features

• Always-on, sunlight-readable high-contrast LCD display.
• Feet or metres setting.
• Automatic calibration.
• Altitude offset adjustment in 100 ft / 30.5 m increments.
• USB-C charging.
• Approximately 3 months battery life.
• Compact size with reduced snag risk compared with larger analogue altimeters.
• Arm mount included.

Display behaviour

The X0 displays three digits plus an optional decimal point. Below 1000 feet or metres it displays 0–999. Above 1000 it changes to a decimal format such as 1.00, 1.01 and higher. Above 10000 it displays values such as 10.0 and 10.1.

Specifications

• Dimensions: 56 × 41 × 12 mm
• Screen: 1.28 inch high-contrast LCD
• Charging: USB-C; cable not included
• Battery life: approximately 3 months
• Colour: black
• Arm band sizes: XS 16 cm, Small 18 cm, Medium 20 cm, Large 22 cm, XL 24 cm

What it does not do

The X0 is deliberately simple. It does not have jump logging, Bluetooth, audible alarms, a backlight or waterproof rating. If you need an audible, logbook or more advanced functions, pair it with a separate device such as an audible altimeter or choose a higher-feature digital altimeter.

Before you order

Choose the arm band size that matches where you plan to wear the altimeter. The arm mount is included in the box. For setup, use and safety information, refer to the official AON2 manual and support resources.

Official AON2 X0 manual