Mobile Medical Alert System

Your mobile medical alert system gets you help anywhere in the U.S.

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4 (167 reviews)

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How many people will be using this system?

One User

Two Users 50% off 2nd user!

Select your payment plan:

Pay Annually


Saves you $120 per year!

Pay Monthly


  • FREE lockbox
  • FREE month of warranty
  • FREE shipping
  • FREE activation
  • Paying annually saves you $120 per year!

  • Push the mobile alert button, get connected to our 24/7 Command Center
  • You decide who we call in an emergency
  • 911 technology locates you if button is pushed
  • Two-way voice. As loud as a cell phone on speaker
  • Showerproof and compatible with pacemakers
  • No GPS. Want GPS? Choose PAX Mobile Medical Alert
  • No cell contract needed. Unlimited talk time and button pushes
  • Coverage wherever there is T-Mobile or AT&T service
  • Designed to wear around the neck. Lookingfor a wristband?

How Does the Mobile Medical Alert System Work?



When you need help, press the button on the Kelsi. It wirelessly notifies Alert1's 24/7 Command Center.



A trained operator from one of our Command Centers will come on the line and ask if you need help.

Locate & Send Help

Locate & Send Help

We will track your location and send the help you need. Our agent will stay on the line with you until we are sure you’re safe.

Kelsi Technical Specifications

Kelsi Mobile Medical Alert System


  • Full duplex speakerphone; 60 decibels

Power and Battery

  • Operating Voltage 4.35-volt internal battery pack
  • Power Consumption:
    • Typical 200A @ 4.2V (deep sleep)
    • Typical 31.5mA@ 4.2V (SMS + UDP connection)
  • Battery life may be reduced as a result of user activity, cellular coverage, talk time, device specific settings, and device life
  • Battery light indicated battery charge
    • Green: Adequate charge
    • Yellow: Moderate charge
    • Red: Low charge

Weight and Dimensions

  • Height: 2.7 inches (67.9 mm)
  • Width: 1.7 inches (42.9 mm)
  • Depth: 0.7 inches (17.4 mm)
  • Weight: 2.0 ounces (56 grams)


  • Federal Communications Commission (FCC), Certified Mobile Operator (PTCRB), Conformité Européene (CE), Global Certification Forum (GCF), PCS Type Certification Review Board (PTCRB), MU509C

Manual Alert

  • Mechanical touch button initiates voice call and simultaneous data transmission to call center

Network + Connectivity

  • Communication Modes: General Packet Radio Service (GPRS) / High Speed Downlink Packet Access (HSDPA) packet data, TCP/IP (Transmission Control Protocol/Internet Protocol), User Datagram Protocol (UDP) and Short Message Service (SMS)
  • Data Support: SMS, GPRS, HSDPA packet data
  • Operating bands: MHz Global System for Mobile communication (GSM)/GPRS: 850/900/1800/1900 Wideband Code Division Multiple Access (WCDMA): 850/1900
  • Transmitter Power: GSM/GPRS: 850/900 – 32.5dB 1800/1900 – 29.5dB HSDPA/Universal Mobile Telecommunications Service (UMTS): All band – 23dB
  • HSDPA Data Rates 384 Kbps upload/3.6Mbps download
  • HSPA Fallback GPRS/GSM quad band
  • Built in display light indicates cellular signal strength
    • Green: Strong signal
    • Yellow: Moderate signal
    • Red: No signal


  • Highly water resistant; designed to be worn in shower or bath
  • Submersible up to 3.33 feet (1 meter) for 30 minutes (IP67)
  • Humidity: Maximum non-condensing humidity 95% RH @ 50°C
  • Restriction of Hazardous Substances (RoHS) compliant
  • Functional at temperatures from -4°F to 158°F (-20°C to 70°C)
  • Storage temperature range: -40° F to 185° F (-40° C to 85° C)

Go Anywhere with Alert1 Protection

Alert1 Go Anywhere with a mobile medical alert system

Alert1's Kelsi mobile medical alert system does not require a base station or landline phone. Designed to wear around the neck so you can travel anywhere with ease and peace of mind.

You can bring the mobile alert anywhere in the U.S. with T-Mobile or AT&T cellular coverage. You do not need to purchase any cellular coverage plans, because we take care of it all for you.

The Kelsi mobile medical alert allows easy, 2-way communication with its built-in microphone and speaker, so we can get you the help you need in case of an emergency.

How Kelsi Mobile Medical Alert Systems Work

Mobile Medical Alert System Benefits

Kelsi Product Features

  • Small and lightweight mobile medical alert
  • Similar GPS systems as 911 with nationwide location accuracy
  • 100% shower safe to protect you at all times
  • 30 day battery life between charges (comparable products only last 48-72 hours)

Personalized Response

  • It doesn't matter where you are or what help you need; an Alert1 mobile alert creates a customized response protocol for each member. We can call family, neighbors or 911 quickly
  • Compare medical alert systems and you'll see why Alert1 is different. We stay on the line with you until we are 100% sure help arrives. You are never alone if you choose the best reviewed mobile medical alert system-Alert1 

Easy Setup

  • After a quick charge the mobile alert will be ready for you to use

Nationwide Monitoring

  • Alert1 features two fully independent US-based Command Centers. Our CSAA certified operators are trained to be calm and reassuring in case of emergencies. They will stay on the line with you until help arrives. When you need help, Alert1 is there for you 24/7
  • Your mobile medical alert device comes with an unlimited amount of button pushes and talk time, so you can press the help button any time you are in need

Protection in and Around the Home

  • The mobile alert system works on the T-Mobile cellular network 24 hours a day so you can take it with you anywhere and still be protected
  • You don't need to buy an additional cellular coverage plan. We take care of it for you

Call us today at 1-866-581-4540 to get on the go protection with Alert1

How Does the Mobile Medical Alert System Work?

Bike Man using mobile medical alert system

Put the mobile alert system in your pocket or around your neck at home or when you are heading out. If you need help at any time, day or night, simply press the help button on your mobile medical alert system. You will be connected via cellular network to a US based emergency operator at our Command Centers. They will ask if you need help and contact a family member, friend or 911 to get you help fast.

30 Day Money Back Refund

30 Money Back on mobile medical alert system

If within the first 30 days of your service you have tested your Alert1 mobile medical alert system, connected to our Command Center and decided you are not happy with it, you can take advantage of our 30-Day Money Back Guarantee*!
     1. Cancel anytime - no hassle!
     2. No cancellation fees
     3. Refund 100% of your service plan payment

*To qualify for a refund, new members must 1) test the medical alert device and connect to the Command Center within 30 days of service 2) subscribe to an annual plan and 3) return the device in its original condition within 30 days from the date that you received it. One-time orders, devices that did not connect to the Command Center and devices returned after 30 days will not qualify for a refund. You will be responsible for returning your device in good working condition. If applied, new shipping costs, activation fees and warranties are non-refundable.

What If I Don't Know Where I Am?

Don't worry, the mobile medical alert system was designed specifically to help in these situations. The operator at our Command Center will open a direct connection with 911 and use their precise cellular technology to locate you within 2 meters. We will then communicate the location to your responders so they can get you help. If your responders aren't near, we will contact the local 911 near your location. Then, we will stay on the line with you until we are sure your help has arrived. Your mobile alert will bring you safety everywhere you go.

Alert1 Reviews

Trust Icons alert1 medical alert systems

My mom fell the other day. No one was scheduled to check on her and her phone had fallen away from her. My brother and I were alerted to the situation. She was on the floor less than 15 minutes. This is a great system. I am so glad we did this for her.

Carol — Florida


best thing i got
Anonymous (Palm Springs, CA)
There could not have been a faster or easier way to call for an ambulance for my sick father than to push the call button. While we have tested the call button many times, this was the first time we ever had to actually use it to call for an ambulance. The person on the phone wasted no time in gathering the information he needed and relaying it to the appropriate people. They arrived within minutes and my father was admitted into ICU. He is still very sick but improving. It is such a comfort to me to have this service available to us and know it is very reliable. We have been customers for several years and I cannot think of one bad thing to say about the professionalism of anyone I have ever spoken with from the company during all those years of test calls and false alarms.
Thank you so much!

Posted on 7/18/2017
Did the job
Anonymous (Narrows, VA)
you called my daughter as requested. Appreciated the follow-up call.

Posted on 7/18/2017
best team working there
Waltraud (Belleview, FL)
They have a team that exemplifies speed and professionalism.

Posted on 7/18/2017
Gloria (MC Cook, NE)
Great service - very quickly activated and it really helped. Thanks!
Posted on 7/18/2017
alert1 is great
Deborah (Santa Ana, CA)
I am her daughter, and it give me a sense of comfort knowing she can contact me through Alert1 at any time.
Posted on 2/17/2017
mom is good
Mary (Seattle, WA)
thanks for watching over my mom
Posted on 2/17/2017
Louise (Heron, MT)
Very professional
Posted on 2/10/2017
awesome fireman
Louise (Brooks, GA)
Fireman came and picked me up I had fallen at the front door ...thank you ...I am very sore but ok...I lost my balance. I have to be more careful.
Posted on 2/10/2017
Peggy (Canon, NM)
This is her daughter, Peggy. You IMMEDIATELY dispatched EMS to assist my elderly mother who has fallen..on numerous occasions. And you IMMEDIATELY contacted me so I could drive to wherever she was and be there for her. ALERT1 IS AWESOME. !!!. I will NEVER changed companies, and will advise all my friends and family of your excellent and courteous services.God bless you ALL. I love you guys!
Posted on 2/10/2017
Marlene (Benedict, MD)
The service was just fantastic. Thank God I had Alert1. I always wear it in the shower, and that is when I needed it.
Posted on 2/10/2017