This is an Aladin Sport Dive Computer, manufactured by Uwatec and sold under the scubapro brand name. Computer was just serviced with new battery installed (not user replaceable) and is in great working condition. Wrist mount design with adjustable strap. This computer will only monitor air breathing gas (21% oxygen content... no nitrox) and will complete all your no decompression calculations including any mandatory decompression as well as monitor depth, max depth, dive time, surface interval and full log book features for saving dive data. Built like a rock, these are the "go to" computers for tech divers