Are your site workers being protected from potential vehicle and machinery accidents? This Bi-Directional Site Safety System is designed to improve safety conditions for workers in environments with excess noise and poor visibility. This system will help to protect against machine vs worker collisions and worker intrusion into hazardous areas. The worker transmitter (Tx) unit is installed inside the worker safety helmet and uses "state of the art" triangulation technology that ensures precise range detection, the machine receiver (Rx) unit can be installed in or on any machinery or hazardous area, when the worker approaches within a pre-set distance of the Rx unit the buzzer alarm in the worker Tx unit will sound, warning the worker of the proximity to a potential hazard, meanwhile the relay output on the Rx unit will trigger the external alarm to alert the machine/area operator. A single system can have a maximum of twenty (20) Rx units and a maximum of eighty (80) Tx units. Please contact us for more information and to purchase safely and securely with Paypal.