Garmin Descent MK2i Smartwatch and T1 Tank GM-010-02132-71 + GM-010-12811-01

Descent MK2i - Multiple Dive modes, ABC sensors w/ 3-axis compass, Surface GPS to mark entry/exit points, Pairs up to 5 tanks. On land Multisport features w/ GNSS support, WHRM, SPO2, Advanced training features, Garmin pay, Music, Smart notifications.

T1 Tank - Monitor tank pressure, remaining airtime, air consumption rate for multiple types of diving. Pairs up to 5 transmitters w/ each MK2i.

• Physical Dimensions: 3.33” x 1.44” x 1.44” (84.50 x 36.52 x 36.52 mm)
• Battery: 3 V CR123A lithium
• Battery life: Up to 100 hours
• Thread type: 7/16 in. (20 UNF)
• Normal operating temperature: From -20 to 60°C (from -4 to 140°F)
• Underwater operating temperature: From 0 to 40°C (from 32 to 104°F)
• Storage temperature: From -30 to 70°C (from -22 to 158°F)
• Wireless frequency: 2.4 GHz @ 0 dBm
• Surface transmission range (ANT wireless technology): Up to 10 m (33 ft.)
• Underwater transmission range (sonar): Up to 10 m (33 ft.)
• Water rating: Dive 110 meters 
• Pressure 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 aging.)