Check the listing for details. Silva Tech4O Radar Ski Speedometer. Non-Working.. Color: Black, Condition: For parts or not working. Listed at 35.00 USD. Silva Tech4O Radar Ski Speedometer. This is it great physical condition and the receiver works. The watch on the other hand is frozen at 12:00 and I just can't get it to work. I'm selling this as non working. Someone with some skills might be able to fix it. When I popped the back I don't see the rubber Gasket. I think it may have seen some moisture but I'm not for sure because the watch face doesn't show any sign by looking at the screen. Honestly I don't know a lot about this item. Everything else is good to go. Silva Tech 4 O S1 Radar Ski Speedometer For Sale is a new but opened package Silva Tech 4 O S1 Radar Ski Speedometer I acquired this at a estate sale was opened but never used. This tells you Speed Distance 7 day memory Wireless coded RF transmission between sensor and receiver,(watch) 3 speed modes Cross country, Nordic, Downhill Calorie counter Time: second, minute, 12/24 hour, day, date, month, year setting Stopwatch w/split times, timer, 2 alarms Backlight with 3 second delay Water resistant up to 30FT.