Heavy Duty USB Isolation The UHR401 and UHR402 are one and two port 4 kV USB isolators with heavy industrial EMC specifications and our signature high retention USB connectors. The 4 kV Isolation protects expensive equipment from dangerous ground loops and helps ensure data integrity. The Heavy Industrial EMC specifications allow these isolators to operate in unfriendly electrical environments - such as near variable frequency drives, motor control centers, welding, and other large electrical loads. The high retention USB connectors hold standard USB cables tight and are perfect for high vibration applications, requiring a minimum of 3.2 lbs.-force to disconnect them. The products have also been tested for shock, drop, and vibration. Due to the nature of isolation and USB, bandwidth is limited to 12 Mbps..