Sierra Wireless - OMM400


Electronic Monitoring Device

The OM500 is a versatile, one-piece, GPS/cellular ankle-worn electronic monitoring bracelet with 2-way communication. The OM500 was designed to track—and communicate with— all types of offenders 24/7, indoors and outdoors. The OM500 signals offenders using vibrations, sound, and audio alerts, and receives offender acknowledgement in return.

The OM500 can pair with Sierra Wireless’s optional RF and Wi-Fi Beacon to precisely verify in-home locations. OM500 uses the cloud-based software application, FocalPoint®, to visualize, map, and track offender movements and locations.

  • Reduced false alerts compared to other systems
  • Track indoors and in GPS-impaired environments with Wi-Fi Beacon
  • Waterproof, submersible
  • Cut-free, fiber optic strap prevents false strap tampers
  • Rapid charging, long life battery allows extended charge capability
  • Sends custom voice messages to offenders in multiple languages
  • Rotating, magnetic charger improves offender charging compliance
Technical Specifications

Location Technologies
GPS, Wi-Fi, Beacon 
Wireless Coverage
Verizon LTE Network 
FCC, Verizon, IC/ISED compliance 
Small size—3.94”(h) x 2.6”(w) x 1.52”(d), Lightweight—8.22 oz. 
IP Waterproof
IP-68, IP-69K 
Safety Specifications
Hypoallergenic, SAR compliant, Safe rechargeable battery, No sharp edges, NIJ Emergency Removal Possible Removal Compliant 
Charger Connection
Rapid charger, rotating magnetic charger 
Standard, reusable 15" (larger 19" size available) 
Tamper Detection
Fiber optic strap, Backplate removal, Water leak detection 
Device Communications
Tone, Vibration, Audio (pre-recorded and custom) 
Device Audio Levels
Standard: 70db, High: 90db