PSI Prodive Diving Compass A robust and reliable diving compass with a reinforced wrist strap for scuba diving purpose. Favorite among dive schools and professionals.PSI diving compass Specifications:- Large easy to read numbers- Large side view window allows for easy and accurate navigation- Large, secure 360° ratcheting bezel- Luminescent gauge face for easy reading in low light- Compass diameter: 2-1/3″- Wrist Mount Length: 15″- Max depth: 80 meters.- Working Temperature: -5C 55C- Maximum working tilt: 25 degrees