This is a Pro Trek PRG-40, a model with enduring popularity. I replaced the battery before listing it. The compass, thermometer, barometer, and altimeter are all functioning correctly. The backlight also lights up normally. The strap has been replaced with a NATO strap. Some parts are missing, and there are three missing screws (see images 12, 13, and 14), but this doesn't affect normal use. I am selling this to organize my collection. To prevent swapping, returns and refunds are not accepted. I ask for your understanding, as I have been a victim of this in the past. Non-smoking environment No pets Instant purchase available prg40 prg-40 Accessories: None Operation: Good Scratches/Cracks: None