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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CJIS-READY MONITORING PLATFORM
A CJIS-ready, zero-trust platform with court-admissible evidence reports, 13 modules for GPS ankle monitor management, offender tracking, zone alerts, and compliance reporting. ECDSA-signed data chain from device to courtroom.
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
CJIS
Security Policy Ready
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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On August 26, 2026, the UK Ministry of Justice announced a policy that no other country has attempted at national scale: restriction zones — geographic boundaries that confine serious sexual and violent offenders to areas as small as a few miles wide after prison release, enforced by mandatory GPS ankle bracelet monitoring. The program launches […]
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When Marshall Rayburn — a 34-year-old man accused of strangling his ex-girlfriend Peggy Beasley to death — was found to have been monitored by an electronic monitoring vendor that lost track of him for days before the murder, Louisiana legislators realized the state’s oversight of ankle monitor providers was essentially nonexistent. The result: Act 858, […]
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When Cook County State’s Attorney Eileen O’Neill Burke stood before cameras in August 2026 and called the county’s electronic monitoring system “fundamentally broken,” she put a number on what corrections professionals across Illinois have known for years: 327 defendants on pretrial electronic monitoring had gone missing. Not temporarily non-reporting—missing. Their ankle monitors had been cut […]
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