The Arva Evo BT is an easy-to-use device of professional-grade quality, making it a reliable choice. Thanks to Bluetooth functionality, the software can be updated whenever the manufacturer releases updates. Additionally, biannual maintenance can be performed through this feature. - The rotary dial is easy to use even with gloves on - 60-meter search width with three antennas - Group Check feature tests transmission frequency and power - Marking function confirms the location of a found victim - Motion detection: automatic return to transmit mode - Detection of up to 4 victims; a "+" symbol indicates more victims are present