NB: WE ORDER GARMIN DIVE COMPUTERS AS NEEDED FOR EACH CUSTOMER, SO PLEASE ALLOW A COUPLE OF EXTRA DAYS. MANY THANKS ADD DIVER COMMUNICATION TO TANK PRESSURE MONITORING Every breath, every tank, every buddy on your dive ? track them all on your wrist when you pair the Descent T2 transceiver with your compatible air-integrated Descent dive computer. Enhanced SubWave sonar technology lets you monitor up to 8 tanks when under water ? viewing air pressure, depth, use rate and time remaining ? for multiple types of diving. Plus, you can even communicate via preformatted messages (coming soon) with other networked buddies wearing their Descent Mk3i dive computers. DEEP DIVE-RATED Built to withstand the elements, the Descent T2 transceiver is dive-rated to20 ATM (200 metres)? so you can dive deeper without worry. KNOW YOUR TANK Get tank pressure, air time remaining, air consumption rate and battery remaining ? all sent directly to your paired air-integrated Descent dive computer. LINK MULTIPLE DIVERS See your dive buddies' tank pressures and depths at a glance. Pair up to 8 transceivers on your group?s tanks with each compatible air-integrated dive computer within a range of up to 10 metres. DIVER MESSAGING Exchange preformatted diver-to-diver messages with other Descent T2 transceiver-networked buddies wearing Descent Mk3i dive computers up to 30 metres away (coming soon). EASY TANK ID A simplified pairing process using wireless area networking makes it easy to identify your buddies? names with the Descent T2 tank transceivers they?re wearing. Specifications Physical dimensions: 84.5 x 36.52 x 36.52 mm (3.33? x 1.44? x 1.44?)Battery: 3 V CR123A lithiumBattery life: Up to 100 hoursThread type: 7/16? (20 UNF)Normal operating temperature: From -20 to 60C (from -4 to 140F)Underwater operating temperature: From 0 to 40C (from 32 to 104F)Storage temperature: From -30 to 70C (from -22 to 158F)Wireless frequency: 2.4 GHz @ 4 dBmSurface transmission range (ANT wireless technology): Up to 10 m (33 ft)Tank pressure transmission range: Up to 10 m (33 ft)Dive messaging: Up to 30 m (98 ft); requires compatible Descent Mk3i dive computerWater rating: Dive 200 metresPressure rating: 300 bar (4351 psi)Inspection interval: Inspect parts before each use for damage. Replace parts as needed (aside from normal wear and tear, performance is not affected by ageing.) In The Box Descent T2 transceiverAir spoolDocumentation