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Absolute AoA

Multi-sensor Angle of Attack system providing accurate AoA
data for all phases of flight, unaffected by density altitude, or weight/loading

Limited time Offer : Pre-Register and Earn 20% SUN ‘n FUN Show Discount Offer Valid till April 7, 2025

Coming Soon

SkyVoice
Alert 500

500 ft Takeoff & Landing Height Announcing LiDAR Altimeter for All Aircraft

Quick Install | FAA Approved | One-time Setup

$1450

$1160

(SUN 'n FUN Offer 20% OFF Valid Till April 07)

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SkyVoice
Glassy Guide 400

400 ft Takeoff & Landing Height Announcing RADAR Altimeter for Seaplanes

Quick Install | FAA Approved | One-time Setup

$1650

$1320

(SUN 'n FUN Offer 20% OFF Valid Till April 07)

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SkyVoice
Glassy Guide 400 Quick Install / Portable

Portable Takeoff & Landing Height Announcing RADAR Altimeter for All Aircraft

Quick Install | One-time Setup

$1790

$1432

(SUN 'n FUN Offer 20% OFF Valid Till April 07)

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Our Products

agon
Model: AOA-S-1P-01

Absolute AoA System

$2,400.00
$1,920.00

agon
Model: LHA-500-A

SkyVoice Alert 500 LiDAR Altimeter

$1,450.00
$1,160.00

agon
Model: GG-400-A

SkyVoice Glassy Guide 400 RADAR Altimeter

$1,650.00
$1,320.00

agon
Model: GG-400-A Quick Install / Portable

SkyVoice Glassy Guide 400 Quick Install/Portable RADAR Altimeter

$1,790.00
$1,432.00

agon
Model: SVA-BTK

SkyVoice Alert Bench Test Kit

$95.00
$76.00

agon
Model: 30-IK-1

30 minute Installation kit

$99.99
$79.99

agon
Model: HML 12-3.5Ah-01

Lithium Ion Rechargeable Battery

$28.00
$22.40

SkyVoice Alert 500, a Take-off and Landing height announcing LiDAR AGL Altimeter. It’s a co-pilot with bird's eye for safer flying. FAA certified as Non-Required Safety Enhancement Equipment (NORSEE).


It is an easy-to-install, affordable device that enhances safety for both certified and experimental aircraft. SkyVoice Alert 500 gives LiDAR range of 590 ft and provides key features like:

  • Height call-outs from 500ft to 1 ft during take-off and landing
  • Gear warnings from 560 ft until the gear is down and locked
  • Many user selectable Reminders on take-off and landing - Check Gear, Checklist, LC GUMPS, Flaps, Speed, Clearance, Prop, Pump, etc…
  • GPS/MSL Height call-outs from 18000 ft to 500 ft & reminders - Check Oxygen, IFR Altimeter Clearance, Prop, Top of descent, etc…
  • Run-time reminders like Check Tank and Check Fuel

FAA-approved as Non-Required Safety Enhancement Equipment (NORSEE), it’s a reliable co-pilot for safer flying.

500ft = 1 Min

Is Gear Down?

How High?

The SkyVoice Glassy Guide 400 is a RADAR based 400 ft Takeoff & Landing Height Announcer, designed for accurate altitude callouts over both water and land. It enhances situational awareness, reducing the risk of optical illusions during critical flight phases.


  • Height call-outs from 400ft to 1 ft during take-off and landing
  • Up to four Gear Reminders
  • Many user selectable Reminders on take-off and landing: Check Gear, Checklist, LC GUMPS, Flaps, Speed, Prop, Clearance, Pump, etc…
  • GPS/MSL Height call-outs from 18000 ft to 500 ft & reminders - Reminders like IFR Altimeter, Check Oxygen, Top of descent, etc…
  • Run-time reminders like Check Tank and Check Fuel

Images & Videos

SkyVoice Glassy Guide 400 RADAR Altimeter Installed in Cessna 182P.


The SkyVoice Glassy Guide 400 Quick Install / Portable, from Holy Micro! LLC, is a portable 400-ft height announcer for all aircraft, working accurately over water and land.


  • RADAR based take-off and landing height announcer
  • Height call outs from 400ft to 1ft
  • Comes pre-loaded with our reliable, self-contained embedded software
  • Crafted from high-quality, aircraft-grade aluminum
  • Bluetooth connection to your headset or audio panel
  • Equipped with a rechargeable battery
  • Versatile Color Options

  • All of the hardware and software inside the portable enclosure is the same as the regular FAA certified Glassy Guide unit. The portable unit allows you to quickly install it temporarily in any location under the wing or the tail to see how well it is working.


Holy Micro! LLC introduces the Absolute AoA System, a next-generation solution for accurate Angle of Attack (AoA) in all flight phases. Unlike traditional systems that only warn near stall, this advanced AoA indicator provides real-time AoA data for climbing, cruising, and landing, unaffected by density altitude, weight, or loading.


  • Reliable AoA for all V-speeds, including Best Glide/Best Range (L/Dmax) & VEC
  • Multi-sensor technology
  • LiDAR-based flap detection
  • Independent air-data system
  • Quick 1-hour installation
  • Multiple digital displays to fit your cockpit
  • High-quality 6061 aluminum AoA probe
  • FAA (NORSEE) approval in progress
  • Patent pending


Pre-Register Now

News and Highlights

Our Happy Customers

Agon

Richard Landis

This product has simplified landing tremendously in my Cessn ... Read More

Agon

Alin from Europe

I recently installed this landing radar on my plane, and as ... Read More

Agon

Jesse Saint

I just installed an LHA-500 in my 172 with a bluetooth audio ... Read More

Agon

Mark Morton

The product is great. I had a beta version installed last Ju ... Read More

Agon

Jim Judkins

I recently had the LHA-500 installed in my PA32R-300. I’ve ... Read More

Agon

Jesse Saint

I have been installing avionics for over a decade, and have ... Read More