A medical alert system — also called a personal emergency response system (PERS) — is a device that allows a senior to call for help with the press of a button. For older adults living alone, it can be a literal lifesaver: the ability to summon help after a fall or medical emergency, even when unable to reach a phone, dramatically reduces the consequences of serious events. This guide explains how these systems work, what types are available, and what to consider when choosing one.
The Basic Concept
At its core, a medical alert system consists of a wearable button (pendant, wristband, or watch) and a way to connect to help when that button is pressed. When the button is pressed, one of three things happens depending on the system: it connects to a 24/7 monitoring center staffed by trained operators, it calls a pre-programmed list of family members or caregivers, or (in some newer systems) it uses AI to automatically detect falls and contact help without requiring the user to press a button.
Types of Medical Alert Systems
Home-Based Systems (Landline or Cellular)
Traditional home-based systems include a base station that stays in the home and a wearable button. The base station either connects via a landline (increasingly rare) or a built-in cellular connection. Range from the base station is typically 300-1000 feet, covering most homes and yards.
When the button is pressed, the base station connects to the monitoring center. The operator can hear the user (the base station includes a speaker and microphone) and respond. If the user cannot communicate, the operator dispatches emergency services.
These are typically the most affordable systems, with upfront costs under $100 for the equipment and monthly monitoring fees of $20-$35.
Mobile (GPS) Systems
Mobile systems use cellular and GPS technology, allowing the user to call for help anywhere — not just at home. The wearable device itself connects to the monitoring center via cellular network. GPS tracking allows the monitoring center (and family members) to pinpoint the user’s location.
These are ideal for active seniors who go out regularly. They cost somewhat more than home systems — $50-$150 upfront and $30-$45 per month — and require regular charging (typically every 1-3 days).
Smartwatch-Style Systems
Several companies offer medical alert functionality in a smartwatch form factor. These combine the features of a mobile alert system with fitness tracking and other smartwatch features, making them less stigmatizing for seniors who resist wearing a “medical” device. They require daily charging and are typically the most expensive option ($150-$300 upfront, $30-$50/month).
Fall Detection Systems
Many modern devices offer automatic fall detection — using accelerometers to detect the signature motion pattern of a fall and automatically initiating a call to the monitoring center without the user pressing a button. This is crucial for situations where a fall leaves the user unconscious or disoriented. Fall detection is not 100% accurate — it can have false positives (triggering from sudden movements) and false negatives (not detecting a slow-slide fall). It should be considered a supplement to the manual button, not a replacement.
Monitoring Center vs. No Monitoring
Professional monitoring (24/7 operator center) is the gold standard. Operators are trained for medical emergencies, dispatch services appropriately, and provide a calm voice when the user may be panicking. The monthly fee pays for this service.
Some systems offer “caregiver network” monitoring instead — the device calls a list of family members or caregivers rather than a professional center. This eliminates the monthly fee but relies on family members being available and reachable 24/7, which is not always realistic.
What to Look for When Choosing
Response time: How quickly does the monitoring center answer? Look for average response times under 30 seconds. Battery life: For home systems, base stations are always plugged in, but the wearable button battery should last at least several months. For mobile systems, daily charging is typical. Water resistance: The device must work in the shower — that is where many falls occur. Look for waterproof (not just water-resistant) ratings. Contract terms: Avoid long-term contracts. Month-to-month agreements are standard among reputable companies. Range: For home systems, confirm the range covers your entire property including yard.