The Descent X30 is compact and affordable - perfect for recreational and open-circuit technical divers. The Descent X50i is designed for technical divers requiring rebreather support, diver-to-diver communication, and deeper dive limits. The X50i together with the T2 wireless transceiver also supports tank pressure reporting and in-water communication via preformatted messages with other networked divers wearing their Descent™ Mk3i or X50i dive computers.