The Wisdom 4 continues the tradition of the Sherwood Scuba Wisdom computer brand. Now in its 4th edition, the Wisdom computer remains one of the bestselling Air Integrated Consoles in the industry. With the easy to read large characters and simple layout the Wisdom is a fan favorite. The most significant difference between the Wisdom 3 and 4 is Bluetooth integration to DiverLog+. With the 4 there is no need for a connecting cable and your laptop or desktop. Just a simple synch between your phone and the Wisdom 4, you can upload all your settings into the Wisdom 4 or download all your dives to the DiverLog+ App. Features: Bluetooth Integration to DiverLog+; Fulltime access to NDL (Dive Time Remaining on Main Screen/NDL available alternative screen); Dive Time Remaining calculates and displays the dive time remaining based on current air consumption rates and available no deco time remaining; Deep Stop Reminder (Safety stop at half the depth in dives exceeding 80 feet); Intuitive Two-Button Navigation; Audible and Visual Alarms; DECO warnings and calculations; Air, Nitrox, or Gauge Modes; Imperial or Metric; Dive Simulator; Repetitive dive planning; Dive Log; Memory 110 Dives; Automatic altitude adjustment up to 14,000 feet; User replaceable batteries.