.svg){kind=small}
.svg)
What it is
EMF is the invisible energy produced by anything that runs on electricity or wireless signals — your phone, router, laptop, smart devices, and the cell towers outside your window.
Phi 1 Portable · $299 · 30-day limited money-back guaranteePhi 1 · $299 · 1-year warranty
.svg)
Phi Series · Portable
Your pocket-sized Blushield for modern wireless life.
Phi 1 Portable produces its own field around you, all day, wherever you go. 1.23 oz and about 3 days per charge.
Ships from Liberty, MissouriFCC · CE · C-tick · RoHS certified30-day limited money-backNo app · No setup · No subscription
Understanding EMF
EMF stands for electromagnetic field.
It is invisible, and it is everywhere.
One-minute read — for
complete beginners
Invisible signals surround you.
Here's what they are.
You don't need to be a scientist to understand this. Here's the one-minute version.
Why people ask about it
Phones, routers and cell towers send signals all day, at home, at work and everywhere in between. Research into long-term everyday wireless exposure is ongoing, and experts still disagree on what it means.
What Blushield does
Blushield doesn't try to block those signals. Phi 1 produces its own continually changing scalar field, patterned on the Phi ratio, a pattern found throughout nature.
Where you meet it Read the research
- Phone4G / 5G0.6–6 GHz
- Wi-Fi routerWi-Fi2.4 / 5 GHz
- LaptopWi-Fi + Bluetooth2.4 / 5 GHz
- Bluetooth earbudsBluetooth2.4 GHz
- Smart homeZigbee / Wi-Fi2.4 GHz
- Cell towersCellular0.6–6 GHz
Free guide
New to EMF? Start with the basics.
A short, plain-English guide to the electromagnetic fields around you every day, and simple habits for living with them. Free, straight to your inbox.
- Where EMF comes from at home, at work and when you travel
- Four easy habits you can start tonight
- How Blushield's approach differs from shielding and blocking
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
We'll email you the guide and occasional Blushield news and offers. Unsubscribe anytime. Privacy policy
Check your inboxYour Everyday EMF Guide is on its way. If you don't see it in a few minutes, check your promotions or spam folder.
Phi Series — Phi 1 PortableBuy now
Small enough to forget. Steady enough to trust.
The Phi 1 fits in any pocket or bag. It runs continuously for three days before recharging. Wherever you go — the office, school run, gym, commute — it goes with you.
- Weight
- 1.23ozLighter than your keys
- Size · to scale
- 3.5 × 1.375 × 0.375 in
- Battery
- Day 1Day 2Day 3~3 days
- Charging · USB-C
- ~1.5 hto full · any USB-C charger
- Coverage
- 3 m9.8 ft radius
- Certified
- FCCCEC-tickRoHS
$299.00
30-day limited money-back guarantee
Phi 1 PortableLanyard-ready · USB-C
How it works
Like tuning a radio to a clear station.
Phi 1 doesn't block, absorb or shield anything. The signals around you stay the same. Phi 1 adds its own field alongside them.
- 01
Your world is full of wireless signals.
These constant, pulsed frequencies are part of modern life, at home, at work and on the move.
- 02
Phi 1 adds a coherent signal.
It produces a structured, multi-band scalar field around you, about 3 m (9.8 ft) in every direction.
- 03
It runs quietly in the background.
No app and no setup. A solid green light shows it's working, and one charge lasts about 3 days.
SOLID GREEN — WORKINGBLINKS OFF EVERY ~30 S — BY DESIGNSOLID RED — LOW BATTERY
Wherever your day goes, it goes too.
Everyday carry
Clip it to a lanyard, drop it in a pocket or bag, leave it on your desk. No app, no setup, no Wi-Fi — just charge it every three days.
Weight
Lighter than your keys.
1.23 oz
- 3.5 × 1.375 × 0.375 in
- ~3-day battery, USB-C charging
- Triangular hole for a lanyard or clip
Drag to explore
Buy now · $299Customer reviews
What Phi 1 owners say
4.29
Based on 55 reviews
06/12/2026
The Portable Device We Trust Most
Our family has been using Blushield technology for over six years, both at home and on the go. As my daughter prepares to move away from home and live in the Miami area, I wanted a portable device specifically designed for those demands. That’s why I chose the Phi Series.
05/08/2026
Updated portable unit
Purchases to replace portable unit from 2022. Works great.
10/22/2025
Great for Travel!
We really enjoy having this device for travel on a regular basis.
09/01/2025
Absolutely love this for our daughter at school! It’s low profile and fits in her backpack like a charm!
06/06/2025
Fulfilling your obligation
One of the Phi 01 Portable units stopped turning on or taking a charge. After notifying Blushield, I was asked to mail it back. I was promptly notified that unit was faulty, and a replacement was on its way. I received the replacement. Thank you.
06/05/2025
Fantastic!
05/14/2025
EASY TO USE!
This O1 portable is so light! I love it!
10/09/2024
Phi 01 strap
The attachment point for the strap on the Phi 01 should be moved to the opposite end. When using the offered pouch, the “on/off” button and power light are obscured from sight at the bottom of the pouch.
08/06/2024
Wonderful
06/30/2024
Phi Series Φ1 Portable
We were able to take the Phi Series Φ2 Plug-in with us while traveling. When we are within the sphere of the unit then I shut off my Phi Series Φ1 Portable pocket unit. Peace of mind!
08/17/2023
Excellent
Blushield’s customer service is second to none. Every interaction has been incredibly positive. This is an amazing company!
09/12/2022
I ordered the older portable model and really liked it. Now that we have this one, we like it even better.
Individual experiences from verified buyers, not health claims. See all 55 reviews.
FAQ
Frequently asked questions
Straight answers for first-timers.
Still have a question?Our support team is happy to help.Contact support
No. It emits its own signal rather than attempting to block or shield the signals around you.
The Phi 1 is designed as a portable companion to a stationary home unit. Used together, they provide coverage at home and on the go. On its own, Phi 1 suits low-to-moderate EMF environments.
USB-C. Any standard USB-C charger works, and a full charge takes about 1.5 hours.
Phi 1's battery is about 1.3 Wh (350 mAh at 3.7 V), well under the 100 Wh limit for devices in carry-on bags. Check your airline's rules before you fly.
Blushield's research page describes the studies Blushield has supported.
Phi 1 Portable
Phi Series · Portable
No app · no setup · no subscription
Phi 1 Portable
$299.00
Buy now · $29930‑day limited money‑back guarantee (restocking fee applies) · 1‑year warranty.Important information
Blushield products are not medical devices. They are not intended to diagnose, treat, cure or prevent any disease, and they are not a substitute for advice from your doctor. These statements have not been evaluated by the Food and Drug Administration.
Customer reviews and stories describe individual experiences. Results vary from person to person.
Phi 1 Portable is $299.00. Unopened devices can be returned within 30 days. Opened devices have a 20% restocking fee, and return shipping is paid by the buyer. Every device has a 1-year warranty against factory defects.
Return Policy · Shipping Policy · Privacy Policy · Terms & Conditions · Contact: 1-800-648-6317 · support@blushield.com