OBJ63 is part of the Signal Ranger (SR) passive series, which are specialized devices used to passively detect and intercept voice, video, and data transmissions. The OBJ63 is a single channel passive direction-finding system that uses two antennas to triangulate the direction of transmitted signals, allowing a user to determine their source. The system can detect signals from up to 9,000 feet away and can be used for both vehicular and stationary operations. It also detects various types of radio frequencies, including UHF, VHF, and microwave, and can detect both analog and digital formats. The OBJ63 includes a built-in GPS receiver and features an intuitive user interface. The system is lightweight and can be deployed quickly in the field, making it suitable for use in a variety of tasks.