Leading ankle monitor manufacturer serving corrections, pretrial, parole & probation agencies in 30+ countries. One-piece GPS ankle monitors with 7-day battery, fiber optic anti-tamper (zero false positives), and <3 second installation.
Next-generation GPS ankle monitors and electronic ankle bracelets. Ultra-high security and reliability powered by 20 years of innovation in electronic monitoring technology.
The lightest one-piece GPS ankle monitor at 108g. 7-day battery, fiber optic anti-tamper (zero false positives), multi-GNSS positioning under 2m accuracy.
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Two-piece GPS ankle bracelet and tracking unit for precision location monitoring. RF wristband pairs with portable tracker for continuous offender supervision.
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Advanced curfew monitoring with integrated cellular and Bluetooth, plus battery backup for continuous operation.
Learn Morebluetooth optical fiber wristband
The smallest professional electronic monitoring anti-tamper wristband in the world — only 17g, virtually indistinguishable from a fitness band.
BLE and RF ankle bracelet options with 2-year battery life. Fiber optic tamper detection for GPS ankle monitor pairing with i-Tracker or HouseStation.
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ENSURING YOUR SYSTEMS SMARTER
A unified web-based platform with 13 modules for GPS ankle monitor management, offender tracking, zone alerts, and compliance reporting. Easily manage your electronic monitoring program at any scale.
Learn MoreONE-STOP MONITORING SOLUTION
From high-risk GPS ankle monitors (CO-EYE ONE) to low-risk smartphone tracking (AMClient), our electronic monitoring product matrix covers every offender supervision need on a single unified platform.
200,000+ devices deployed across 30+ countries. 7-day battery. Zero false tamper alerts. Under 3-second installation.
Get started today200,000+
Devices Deployed
30+
Countries Served
20+
Years of Experience
0
False Tamper Alerts
REFINE Technology (CO-EYE) has been a professional ankle monitor company since 2004, providing GPS ankle monitors and electronic monitoring solutions to government agencies, corrections departments, and bail bond companies worldwide.
Expert resources to help you understand, evaluate, and deploy electronic ankle monitoring technology.
Complete guide to ankle monitors: how they work, types (GPS, RF, alcohol), who wears them, costs, rules, and the technology behind modern electronic monitoring devices.
Read the complete guide →Technology comparison, vendor landscape, 10 evaluation criteria, RFP writing guide, cost analysis, and deployment best practices for corrections and pretrial agencies.
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A probation officer in Oklahoma opens her dashboard. Three scheduled biometric check-ins came through overnight — each showing a clear selfie of the defendant, matching enrollment photos, passing the liveness detection prompt. Location data shows the phone at the defendant’s registered address. Everything looks clean. But the defendant hasn’t been at that address in 72 […]
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On May 28, 2026, the Indianapolis Star published an investigation that should force every electronic monitoring stakeholder to confront an uncomfortable truth: a GPS ankle monitor — a device designed to track location — led to the amputation of an asylum seeker’s leg in Indiana. The bracelet gripped his left ankle so tightly that it […]
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On June 24, 2026, South Korea will launch a system that no other country has attempted at national scale: giving stalking victims direct, real-time access to the GPS location of their offenders on a smartphone map. The Ministry of Justice demonstrated a working prototype on May 27 at the Central Location Tracking Control Center in […]
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