Full-Color TFT (Thin-Film Transistor) 2.2in/5.6cm LCD display screen (320x240p) produces vibrant colors for maximum readability to quickly direct your attention to what you need to know. (TFT screens use less energy. More efficient than other screen types to help extend battery life.) Choice of screen display configurations lets you customize your data presentation with Light, Classic, Full or Graphical screen options to suit your individual diving style. Predictive Multi-Gas ZHL-16 ADT MB algorithm programs up to 8 nitrox/trimix mixes to handle any recreational or technical diving scenario.Integrated heart rate monitor measures heartbeat and skin temperature and incorporates both into the workload calculations. Integration with the HRM Is exclusive to SCUBAPRO.Heart rate monitor also lets you visually track your heart rate real time to ensure you stay in your individual target zone to maximize your fun and safety at depth. Hoseless air integration monitors tank pressure plus provides true remaining bottom time (RBT) and allows air consumption to be factored into the decompression calculation. Provides support for up to 9 transmitters when all features are activated. Improved, full tilt digital compass, the best available, includes half-compass rose and bearing memory. Multiple dive modes includes Scuba, Freediving, Gauge, CCR and Sidemount for total in-water versatility. (Freediving, Trimix, CCR and Sidemount modes are disabled from the factory. Activation is easy -- no downloading or upgrading is required.) Maximum operating depth is 394ft/120m for reliable data computing regardless of diving situation. Huge 485MB memory stores pictures, tables, tissue loading status, and 1,000 hours of dive profiles. USB cable or Bluetooth Low Energy interface easily downloads dive data to your phone or handheld device. Download dive data to a PC/Mac using LogTRAK software.Rechargeable battery provides up to 50 hours of dive time per charge. Battery must be changed by the dealer.