This is the Shearwater Tern TX Air Integrated Scuba Diving Computer (transmitter sold separately) Features: Multiple Diving Modes: Air, Nitrox, 3 Gas Nitrox, Gauge, and Freediving Full Colour, High Resolution, AMOLED 1.3" display with deep blacks, and vivid colour display Modern, Sleek Profile Robust design with toughened glass, modern bezel design and USB-C wireless charging Air Integrated Connects up to 4 Transmitters (Optional) 3 axis, tilt compensated, digital compass Bluetooth® wireless technology Screen Resolution 360 x 360 Display Type Full Colour AMOLED Screen Brightness Minimum 300 nits, Typical at 350 nits Display Size 3.30cm / 1.3" Toughened Glass Window Yes Battery Type Rechargeable Li-ion Battery Factory Replaceable Battery Life up to 20 Hours (Medium Brightness) up to 6 months (Standby) Wireless Charging Station Yes Number of Gases 3 OC Depth Rating 120m / 394ft Dive Log Capacity (10 second rate) 500 Hours Size (Dive Computer) Diameter - 50mm Thickness - 16mm Weight (Dive Computer) 100g TRANSMITTER Sold Separately COM355 The Shearwater Tern TX redefines diving convenience and versatility for sport divers. Incorporating a compact design with advanced features, this dive computers, with its transmitter-enabled capability, provide unparalleled functionality. The enhanced visibility, user-friendly interface, and compatibility with multiple diving modes, make them an essential tool for divers seeking reliability and ease of use. The Tern TX features a 1.3” AMOLED screen with clear visibility in various lighting conditions. The watch-style design and high-resolution display ensure easy access to vital diving data.The Tern TX stands out with its ability to connect to up to four Swift transmitters and includes a digital compass. Both models support Air, Nitrox, 3 Gas Nitrox, Gauge, and Freedive modes.Designed and Built in Canada and depth-rated to 120 meters, these computers meet EN standards for dive compliance. They come with Shearwater’s new Remora™ quick connect bands and webbing straps, offering easy customization with various strap lengths and colors. Check out the whole Tern Collection