Monitoring Device

MS40
Ankle Tracker

MS40 Electronic Control Device is a tamper-proof ankle tracker designed for community correction and criminal justice monitoring. It provides real-time GPS & WiFi positioning, geo-fencing, SOS alerts, and two-way communication — enabling non-custodial supervision of parolees, probationers, and suspects released on bail.

GPS + WiFi Tamper-Proof Geo-Fencing SOS Alert Two-Way Voice 210g
MS40 Tamper-proof Ankle Tracker

GPS & WiFi Hybrid Tracking

MS40 combines satellite GPS with WiFi positioning for accurate location tracking — both outdoors and indoors where GPS signals may be weak.

GPS Positioning

Outdoor
Satellite Tracking

High-sensitivity GPS receiver provides accurate outdoor positioning. Supports continuous tracking with configurable update intervals for real-time location monitoring of the wearer in open environments.

WiFi Positioning

Indoor
Assisted Location

WiFi-based positioning supplements GPS in indoor environments where satellite signals are blocked. Ensures continuous location awareness inside buildings, underground, and dense urban areas.

Secure & Reliable Monitoring

Comprehensive electronic monitoring capabilities designed for community correction programs and criminal justice supervision.

Tamper-Proof Strap

Designed with a secure locking mechanism and tamper detection sensor. Any attempt to cut, break, or remove the strap triggers an immediate alarm to the monitoring platform.

Geo-Fencing

Set virtual boundaries for restricted zones or designated areas. The platform automatically alerts supervisors when the wearer enters or exits a defined geo-fence perimeter.

SOS Alert

Built-in SOS button allows the wearer to send an emergency alert to the monitoring center with their current location, ensuring rapid response in critical situations.

Two-Way Voice

Enables two-way voice communication between the wearer and monitoring center. Supervisors can initiate calls or the wearer can call for assistance through the built-in speaker and microphone.

Long Battery Life

Built-in rechargeable battery provides extended operation on a single charge. Low-battery alerts are sent to the platform, ensuring timely charging without supervision gaps.

Platform Integration

Seamlessly integrates with the MShield monitoring platform for centralized management. View real-time locations, track history, manage alerts, and generate compliance reports.

MShield Monitoring Platform

The MS40 ankle tracker integrates with the MShield monitoring platform to provide a complete community correction solution — from real-time tracking to compliance reporting.

Real-Time Map Tracking — Live location display with historical trajectory playback on an interactive map interface.
Multi-Level Alert System — Tamper, geo-fence violation, low battery, and SOS alerts with automated escalation workflows.
Compliance Reporting — Automated generation of supervision reports for parole boards, probation officers, and judicial authorities.
Wearable Comfort — Ergonomic design with skin-friendly materials for long-term wearing comfort, weighing only 210g.
MShield Monitoring Platform Dashboard

Community Correction & Justice

MS40 supports non-custodial supervision across multiple criminal justice scenarios, reducing recidivism while lowering incarceration costs.

Parole Supervision

Monitor parolees in the community, ensuring compliance with release conditions and movement restrictions. Provides documented evidence of adherence to parole terms.

Probation Monitoring

Track individuals on probation, verifying they remain within permitted areas and attend required appointments. Reduces the need for in-person check-ins.

Bail Supervision

Monitor criminal suspects released on bail, providing an alternative to pre-trial detention while ensuring court appearance and public safety.

MS40 Ankle Tracker worn in daily life

Product Specifications

Model
MS40
Product Type
Tamper-Proof Electronic Monitoring Device
Dimensions
81.92 × 70 × 22.88 mm
Weight
0.21 kg (210g)
Positioning
GPS + WiFi Assisted Positioning
Communication
4G LTE / 3G Cellular Network
Tamper Detection
Strap cut / removal sensor with real-time alarm
Geo-Fencing
Configurable virtual boundaries with entry/exit alerts
SOS Function
Dedicated SOS button for emergency alerts
Voice Communication
Two-way voice with built-in speaker & microphone
Battery
Rechargeable lithium-ion
Charging
Magnetic contact charging
Low Battery Alert
Automatic notification to monitoring platform
Strap Material
Skin-friendly hypoallergenic polymer
Locking Mechanism
Tamper-proof locking strap, tools required for authorized removal
Platform
MShield Monitoring Platform (cloud-based)
Operating Temperature
-20°C to 55°C
Water Resistance
IP65 rated (splash & rain resistant)
Product Code
MS40

Enhance Your Community Correction Program

Contact us to learn how MS40 can integrate with your monitoring infrastructure and support your criminal justice supervision needs.

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