This is the Shearwater Perdix 2 TI Titanium Bezel OC/CC Trimix Computer And SWIFT Transmitter Features: User replaceable AA battery Air, nitrox, trimix capable Quick OC bailout from CC 3 axis, tilt compensated, digital compass Decompression Dive planning Buhlmann GF algorithm Strong vibration warning alerts Aluminosilicate toughened glass Optional VPM-B, Optional DCIEM Dive logging Upgradeable firmware BluetoothA(R) wireless technology Optional air integration Transmitter: Smart AI Technology Advanced collision avoidance system ensures reliability using multiple transmitters Randomized transmit interval allows for reliable simultaneous use of multiple SWIFT transmitters Up to 300 dive hours Compatible with all air integrated Shearwater dive computers: Connects to Teric, Perdix AI and Nerd 2 computers Compatible with many other computers that are already on the market LED status indicator Easy &';no tools&'; installation and removal on divers first stage The PERDIX 2 is our toughest and most reliable full-size computer yet. The armoured casing with precision titanium surround bezel and dependable titanium piezo touch buttons protect performance-enhanced electronics. An aluminosilicate glass lens guards a fantastic 2.2" bright screen and offers improved clarity, impact, and damage resistance. A strong vibration customizable alert system draws attention at critical moments of the dive. Air integration with up to four Shearwater transmitters allows room to grow from a first computer to a powerful, proven advanced technical diving solution. This is delivered using the trusted and easy to find user-changeable single AA battery and familiar ergonomic compact form factor. PERDIX 2 is available in Ti and Ti Black colour finishes