The new S1+ combines the success stories of two unique transceiver innovations: the display of the relative location of avalanche victims & the SMART ANTENNA TECHNOLOGY! The Ortovox S1 is a sensor controlled avalanche receiver whose three antennas allow for multiple burial detection. The flip phone design of the transceiver makes it light, compact & easy to carry at all times. The harness that comes with the transceiver is even handily labelled so theres no difficulty when strapping it on. The basic functions of the sensor are easy to grasp & use: when the transceiver is shut it is in transmit mode & to turn it on to search mode, simply flip it open. After 90 seconds of inactivity, it will automatically switch back to transmit mode (though this can be changed to happen after 30, 60 or 120 seconds) which is an important safety feature in the instance of a follow up avalanche. The transceiver computer screen display shows all the buried victims in the area on a map, with the distance to each victim shown. When locating a victim, they will be shown on screen as a man, which you can then line yourself up with & walk towards. Other buried victims will then be shown passing on either side of you as you walk towards the primary victim. Up to three victims can be displayed on the screen at one time. When you are three metres away, the display changes to that of a circle containing the distance to the victim in the middle, with arrows warning you if you go in the wrong direction or away from the body. The transceiver emits an audible tone as well to alert you to the proximity of the body, which changes in tone when you are close to the victim. The transceiver has the added feature of being able to suppress the buried victims transceiver signal once you have pinned their location, allowing you to move on to the next victim. Warning signals will be displayed on screen if you stop moving or tilt the transceiver whilst it is still gathering information, reducing its ability to process the information correctly. It also features a compass & inclinometer. It is essential that you practice with the transceiver before taking it off piste to ensure you know how to use it correctly in case of an emergency. Whilst most of the signs that appear on screen are easy to underst&, some may require you checking the user manual.