👆 First steps
To get started, flip the power switch to 🟢 green.
It's on the bottom of the device.
For transportation of Guardian Ultrasonic or more than a couple of days without using it, flip the switch back off to preserve 🔋 battery life.
🤙 Usage
Place your phone flat on the top surface. Guardian Ultrasonic will detect your phone automatically and start protecting your privacy.
A short upbeat sound 🔈 will play and the Guardian front logo will light up 💡 and stay on while Guardian Ultrasonic is active.
It will automatically turn off once all phones are removed.
(If nothing happens, first charge your Guardian Ultrasonic with the included USB cable.)
Tips
We recommend keeping a minimum distance of 1 meter (3.3 feet) away from the device while in use
⚡️ Battery & Charging
The built-in battery will bring you through a full day of meetings and run for almost 8 hours when fully charged.
The LED light next to the charging port on the side of the device will indicate the current battery level.
🟢 Green: More than 50 percent
🟠 Amber: 15 - 50 percent
🔴 Red: Less than 15 percent
🚨 A single alert sound will play while the device is active, if the battery is at or under 15%.
🚨🚨🚨 The alert sound will play 3 times in a row when the battery is drained and Guardian Ultrasonic is about to turn off.
💬 FAQ
Is Guardian Ultrasonic a jammer?
No, not in the traditional sense. It doesn't block radio signals like mobile data, Wi-Fi, or Bluetooth. Guardian Ultrasonic uses ultrasonic acoustic waves (high-frequency sound) to physically interfere with microphones.
Does it block all microphones in the room?
Guardian Ultrasonic is designed to protect you from your devices recording your private conversations. It does not cover the whole room. (careful with products claiming to do so - they are usually misleading.)
Does it work with phone cases?
Yes, it works with most phone cases. Certain phones cases with a subpar build quality can sometimes block the microphone slightly. In those situations simply place the phone on the device without a case.
How should I transport the device?
Flip the power switch on the bottom to off. Use the original product packaging or a padded bag - the product packaging was specifically designed to protect the device during transport and includes space for the USB-C charging cable.
How do I store the device?
Flip the power switch on the bottom to off. You can still charge the battery while it's off. Store it in a dry place, away from heat or direct sunlight.
Is Guardian Ultrasonic safe for my phone?
Yes it is safe. It doesn't affect your phone in any harmful way. The ultrasonic waves target microphones only and the device has been in use in our offices for a longtime without issues.
🧐 Troubleshooting
First step, plug the device in with the provided USB-C cable to make sure the battery is not empty.
Device not turning on?
Make sure the power switch on the bottom of the device is flipped to green (see first step above).
Not activating when a phone is placed on the top surface?
If you cannot hear the activation sound and see the Guardian front logo light turn on after placing a phone at the top, try to reposition the phone.
Poor or degraded microphone jamming quality?
There are multiple reasons why the jamming quality may be impacted. Follow each step to identify the issue:
Reposition your phone on the top surface by placing the phone microphones closer to the edge of Guardian Ultrasonic. Closer proximity of the phone microphones to the edge can improve microphone jamming quality.
Avoid placing your phone on the top surface in a steep angle [ / ] but instead prefer a neutral position [ I ]
If your phone is in a case, take off the case and try without. Some phone cases, depending on build quality and precision of microphone cutouts, can interfere with the microphone jamming quality.
A common issue is small pieces of dirty / jeans fiber collecting over time in the phone microphone cutouts. Take a small pointy object, like a toothpick, and gently remove dirty from the microphone cutouts. This can improve the microphone jamming quality dramatically.
See this cleaning instruction video https://www.youtube.com/watch?v=CHBJ61GQons&t=55s
👮♂️ Warning
To keep yourself and the Guardian Ultrasonic device safe, please pay attention to the list below.
Do not open or modify the device
Opening or modifying the device may cause it to stop working properly and will void your warranty.
Battery handling
The built-in battery is not user-replaceable. Improper handling can cause damage or fire.
Keep the device it dry and cool
Do not expose the device to water, extreme temperatures or direct sunlight for an extended period of time. The device is best suited for indoor use.
FCC Compliance Statement
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
This device may not cause harmful interference.
This device must accept any interference received, including interference that may cause undesired operation.
Changes or modifications not expressly approved by Guardian GmbH could void the user’s authority to operate this equipment.
Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.
Note: This equipment complies with part 18 of the FCC Rules.
WARNING: This product can expose you to chemicals including cobalt, lithium nickel oxide, and nickel, which are known to the State of California to cause cancer and/or birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.