The Swift transmitter allows divers to carry multiple transmitters reliably. The collision avoidance protocol allows for multiple transmitters to be used at the same time with a lower likelihood of dropped communications. The Swift is designed and built in Canada for demanding divers of all proficiency levels. Features 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 LED status indicator Easy 'no tools' installation and removal on divers first stage Connects to Teric, Perdix AI and Nerd 2 computers Compatible with many other computers that are already on the market Dimensions Size 76mm (L) x 34mm (D) Weight 135g Battery Battery type CR2 3V Lithium (User replaceable) Battery operating life Up to 300 dive hours (HP pressure present) 5  year storage time Specifications Depth limit 200msw Operating temperature range +4C to +34C Short-term (hours) temperature range -10C to +50C Pressure port 7/16" - 20NF Rated air pressure 300 bar/4350 psi Pressure reporting resolution 0.14 bar / 2 psi HP port proof pressure 450 bar / 6525 psi Accuracy 5% full scale Zero offset< 3.5 bar (50 psi) Activation pressure 7 bar (100 psi) De-activation pressure 3.5 bar (50 psi) Cover screws 1.5mm hex Body o-ring 24 x 1.5mm HP port o-ring AS568-904 75A